Isro Electronics Lengthy Quiz 1-26/07/2020

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  • 1/59 Questions

    Time constant of a series R-L circuit is given by (A) LR (B) L/R    (C) L2R (D) LR2

    • Option 1
    • Option 2
    • Option 3
    • Option 4
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Total 60 questions
1 hour 30 minutes duration
Complete electronics syllabus
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Isro Electronics Lengthy Quiz 1-26/07/2020 - Quiz

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  • 2. 

    Free electrons exist in (A) first band (B) second band (C) third band (D) conduction band

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    Free electrons exist in the conduction band.

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  • 3. 

    Spacecraft Lander is also known as.... A. Vikram B. Vijay C. Vikramaditya D. None of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    The correct answer is Option 1. Spacecraft Lander is also known as Vikram.

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  • 4. 

    Power density is basically termed as power per unit area A.Reflected B.Refracted C.Radiated D.Diffracted

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    Power density refers to the amount of power that is radiated or transmitted per unit area. It is a measure of how concentrated the power is in a given area. This can be seen in various applications, such as in wireless communication systems where power density is important for determining the range and coverage of the signal. In this case, power density is specifically referring to power that is radiated, making option C, "Radiated," the correct answer.

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  • 5. 

    According to ISRO, Chandrayaan-2 moon mission will explore which area of the moon? A. Moon’s North Pole B. Moon's South Pole C. Moon's North-West part. D. Unexplored part of the Moon

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    Chandrayaan-2, the moon mission by ISRO, will explore the South Pole of the moon. This area of the moon has not been extensively explored before, making it a significant target for scientific research and discovery. By studying the South Pole, scientists hope to gather valuable information about the moon's geology, water ice deposits, and potential for future human missions.

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  • 6. 

    The power factor of an AC circuit is equal to      A. Cosine of the phase angle    B. Sine of the phase angle    C. Unity for a resistive circuit    D. Unity for a reactive circuit

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    The power factor of an AC circuit is equal to the cosine of the phase angle because the power factor is the ratio of the true power (P) to the apparent power (S) in the circuit, and the cosine of the phase angle is equal to the ratio of the adjacent side to the hypotenuse in a right triangle. In an AC circuit, the true power is the product of the voltage, current, and the power factor. Therefore, the power factor is directly related to the cosine of the phase angle.

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  • 7. 

    In a transistor largest dimension is that of      A.Emitter    B.Base    C.Collector    D.None of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    The largest dimension in a transistor is that of the collector.

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  • 8. 

    In which kind of waveform is the phase velocity defined? A.Sinusoidal B.Rectangular C.Square D.Triangular

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    The phase velocity is defined in a sinusoidal waveform.

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  • 9. 

    3. Why do the microprocessors possess very few bit manipulating instructions ? A. Because they mostly operate on bits/ word data B. Because they mostly operate on byte/word data C. Both a & b D. None of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    Microprocessors possess very few bit manipulating instructions because they mostly operate on byte/word data.

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  • 10. 

    The current amplification factor (a) is given by (A) IC / IE     (B) IC / IS (C) IB / IE (D) IB / IC

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    The current amplification factor (a) is given by IC / IE. This means that the current gain of the amplifier is determined by the ratio of the collector current (IC) to the emitter current (IE). This ratio represents the amplification capability of the transistor, as it shows how much the input current is amplified to produce the output current. The higher the value of IC / IE, the greater the amplification factor and the more effective the transistor is as an amplifier.

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  • 11. 

    Chandrayaan-2 Lunar mission comprises: A. An Orbiter B. Lander C. Rover D. All the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    Chandrayaan-2 Lunar mission comprises an Orbiter, Lander, and Rover. This means that all the options mentioned in the question are correct.

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  • 12. 

    Which rocket will carry Chandrayaan-2 into the space? A. PSLV B. GSLV C. GSLV Mk-III D. RLV-TD

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    Chandrayaan-2 will be carried into space by the GSLV Mk-III rocket.

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  • 13. 

    A closed path made by several branches of the network is known as      A. Branch    B. Loop    C. Circuit    D. Junction

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    A closed path made by several branches of the network is known as a loop.

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  • 14. 

    Which of the following is an active device ? (A) Transformer (B) Silicon controlled rectifier     (C) Electron bulb (D) Loud-speaker.

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    A silicon controlled rectifier (SCR) is an active device because it is capable of controlling the flow of electric current. It is a semiconductor device that acts as a switch, allowing current to flow in one direction when a small control signal is applied to it. This makes it an active device as it requires an external signal to control its operation. In contrast, a transformer, electron bulb, and loud-speaker are passive devices that do not have the ability to control current flow.

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  • 15. 

    Chandrayaan-2 spacecraft has how many modules? A. 2 B. 3 C. 4 D. 5

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    Chandrayaan-2 spacecraft has three modules.

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  • 16. 

    Electric pressure is also called      A. Resistance    B. Power    C. Voltage    D. Energy

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    Electric pressure is also called voltage. Voltage refers to the electric potential difference between two points in an electrical circuit. It is the force that drives electric current through a conductor.

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  • 17. 

    Which of the following is donor impurity element ? (A) Aluminium (B) Boron (C) Phosphorus    (D) Indium

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    Phosphorus is the donor impurity element because it has five valence electrons, one more than the four valence electrons of silicon. When phosphorus is added to silicon, it donates its extra electron, creating an excess of negative charge, and making the silicon material n-type. This extra electron is free to move and conduct electricity, making phosphorus a commonly used donor impurity in semiconductor materials.

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  • 18. 

    An oscilloscope is generally used to measure the value of (A) dc voltage (B) rms, ac voltage (C) peak to peak ac voltage      (D) average value of ac voltage

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    An oscilloscope is generally used to measure the peak to peak AC voltage. It is a device that displays the waveform of an electrical signal, allowing the user to measure various parameters such as amplitude, frequency, and time period. The peak to peak voltage refers to the difference between the maximum positive and negative amplitudes of an AC signal. The oscilloscope can accurately measure this value, making option 3 the correct answer.

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  • 19. 

    Number of h parameters of a transistors are (A) 1 (B) 2 (C) 3 (D) 4 

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    The correct answer is option 4. A transistor has 4 parameters, namely: base-emitter voltage (VBE), base current (IB), collector-emitter voltage (VCE), and collector current (IC). These parameters are important in determining the behavior and characteristics of a transistor in a circuit.

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  • 20. 

    In non-linear network does not satisfy      A. Superposition condition    B. Homogeneity condition    C. Both homogeneity and superposition condition    D. Homogeneity, superposition and associative condition

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    A non-linear network does not satisfy both the homogeneity and superposition conditions. The homogeneity condition states that when the input to a system is scaled by a constant factor, the output should also be scaled by the same factor. The superposition condition states that when multiple inputs are applied to a system simultaneously, the output should be the sum of the individual outputs produced by each input. In a non-linear network, the output is not directly proportional to the input and does not follow these conditions.

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  • 21. 

    Impulse function is an odd function. a) True b) False

    • Option 1

    • Option 2

    Correct Answer
    A. Option 2
    Explanation
    An impulse function is not an odd function. An odd function is defined as a function that satisfies the condition f(-x) = -f(x) for all x in its domain. However, an impulse function, also known as a Dirac delta function, is not defined for negative values of x and does not satisfy the condition for odd functions. Therefore, the statement is false.

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  • 22. 

    What are the main features of a receiver? a) Synchronization b) Multiple parallel receiver chain c) Synchronization & Multiple parallel receiver chain d) None of the mentioned

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    The main features of a receiver include synchronization and multiple parallel receiver chains. Synchronization is important for the receiver to accurately interpret and decode the incoming signals. Multiple parallel receiver chains allow for improved signal reception and processing, increasing the overall performance and reliability of the receiver.

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  • 23. 

    Pulse modulation is used in (A) radio navigation (B) automatic landing equipment (C) data communication (D) all of the above     

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    Pulse modulation is used in all of the above applications, including radio navigation, automatic landing equipment, and data communication. This technique involves encoding information by varying the amplitude, duration, or position of pulses in a signal. In radio navigation, pulse modulation is used to transmit navigational information to aircraft. Automatic landing equipment also utilizes pulse modulation to accurately guide aircraft during landing. Additionally, pulse modulation is commonly used in data communication to transmit digital data over a communication channel. Therefore, option 4 is the correct answer.

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  • 24. 

    _____ counter is a type of a shift register counter. A.BCDB.RingC.Decade D.Binary

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    A binary counter is a type of shift register counter. A shift register is a digital circuit that can store and shift data. A counter is a circuit that counts the number of clock cycles or pulses. In a binary counter, the count value is represented in binary form, with each bit representing a power of 2. This allows the counter to count in binary sequence, incrementing by one for each clock pulse. Therefore, option 2, Binary, is the correct answer.

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  • 25. 

    What is the area of a Unit Impulse function? a) Zero b) Half of Unity c) Depends on the function d) Unity

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    The area of a unit impulse function is equal to unity. This is because a unit impulse function is defined as a function that is zero everywhere except at a single point, where it is infinitely large. The area under the curve of a unit impulse function is therefore equal to the value of the function at that point, which is unity.

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  • 26. 

    Demodulation (A) is performed at the transmitting station (B) removes side bands (C) rectifies modulated signal (D) is opposite of modulation

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    Demodulation is the process of extracting the original information signal from a modulated carrier signal. It is the opposite of modulation, which is the process of adding the information signal to the carrier signal. Therefore, option D is the correct answer as it correctly states that demodulation is the opposite of modulation.

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  • 27. 

    The length of the sweep on the CRT screen controlled by (A) syne control (B) sweep selector (C) horizontal gain      (D) vertical gain

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    The correct answer is option 3, horizontal gain. The length of the sweep on the CRT screen refers to the horizontal distance covered by the electron beam as it scans across the screen. The horizontal gain controls the amplification of the horizontal deflection signal, which determines the length of the sweep. By adjusting the horizontal gain, the user can control the width of the displayed waveform or image on the screen.

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  • 28. 

     In nodal analysis, if there are N nodes in the circuit then how many equations will be written to solve the network ?    A. N - 1    B. N + 1    C. N    D. N - 2

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    In nodal analysis, the number of equations written to solve the network is equal to the number of nodes minus one. This is because one of the nodes is taken as the reference node and the voltages at all other nodes are measured with respect to this reference node. Therefore, only N-1 equations are needed to solve the network.

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  • 29. 

    In which of the following applications vacuum tubes are still being used ? (A) public address system (B) radio receivers (C) radio transmitters     (D) electroplating plants

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
  • 30. 

    A JFET can operate in      A.Depletion mode only    B.Enhancement mode only    C.Depletion and enhancement modes    D.Neither enhancement nor depletion mode

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    A JFET can operate in depletion mode only. This means that the JFET is normally conducting current and can be turned off by applying a reverse bias voltage. In depletion mode, the channel of the JFET is already formed and applying a reverse bias depletes the channel, reducing the current flow. In enhancement mode, the JFET is normally off and can be turned on by applying a forward bias voltage. However, a JFET does not have the ability to operate in enhancement mode, so option 1 is the correct answer.

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  • 31. 

    How many flip-flops are required to make a MOD-32 binary counter?   A. 5   B.8   C. 6   D. 45

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    To make a MOD-32 binary counter, we need to count up to 32 in binary. In binary, 32 is represented as 100000. Each bit in the binary representation represents a flip-flop. Therefore, we need 5 flip-flops to make a MOD-32 binary counter.

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  • 32. 

    Which of the following modulating system is digital ? (A) PPM (B) PWM (C) PCM     (D) PEM

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    PCM (Pulse Code Modulation) is a digital modulating system because it converts analog signals into a digital format by sampling the signal at regular intervals and quantizing the amplitude levels. This digital representation allows for accurate transmission and reproduction of the original analog signal. PPM (Pulse Position Modulation), PWM (Pulse Width Modulation), and PEM (Pulse Excitation Modulation) are all analog modulating systems.

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  • 33. 

    To observe a portion of a wave form we must use (A) free-running oscilloscope (B) triggered-sweep oscilloscope     (C) vector scope (D) cathode ray tube

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    To observe a portion of a wave form, we must use a triggered-sweep oscilloscope. This type of oscilloscope allows us to capture and display a specific portion of the waveform by triggering the sweep at a specific point or condition. This is useful for analyzing specific events or abnormalities in the waveform. The other options, such as a free-running oscilloscope, vector scope, or cathode ray tube, do not offer the same level of control and precision for observing a specific portion of a waveform.

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  • 34. 

    An op-amp when used as a notch filter has a notch frequency = 2kHz, low frequency point = 2.2 kHz. The Q of the notch is (A) 0.5 (B) 5    (C) 0.2 (D) 2

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    The Q factor of a notch filter is calculated by dividing the notch frequency by the difference between the low frequency point and the notch frequency. In this case, the notch frequency is 2kHz and the low frequency point is 2.2kHz. Therefore, the Q factor is calculated as follows: Q = 2kHz / (2.2kHz - 2kHz) = 2kHz / 0.2kHz = 10. Option 2, which is 5, is the closest approximation to 10.

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  • 35. 

    A circuit component that oppose the change in the circuit voltage is      A. Resistance    B. Capacitance    C. Inductance    D. All of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    Capacitance is a circuit component that opposes the change in circuit voltage. When the voltage across a capacitor changes, it takes time for the capacitor to charge or discharge, causing it to oppose the change in voltage. This property of capacitance is utilized in various electronic applications such as smoothing power supplies, filtering signals, and storing energy.

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  • 36. 

    Precision measurement of resistance is generally carried out by (A) Potentiometer method (B) CRO method (C) Voltmeter-ammeter method (D) Bridge method       

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    The correct answer is option 4, the bridge method. The bridge method is commonly used for precision measurement of resistance. It involves the use of a bridge circuit, such as a Wheatstone bridge, which allows for accurate comparison and measurement of resistances. The bridge circuit is balanced when the ratio of resistances in the circuit is equal, and this balance point can be used to determine the unknown resistance. This method is widely used in laboratories and industries for precise resistance measurements.

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  • 37. 

    A network which contains one or more than one source of e.m.f. is known as      A. Linear network    B. Non-linear network    C. Passive network    D. Active network

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    An active network is one that contains one or more sources of electromotive force (e.m.f.), such as batteries or generators. These sources provide energy to the network and actively contribute to the circuit's behavior. In contrast, a passive network does not contain any sources of e.m.f. and relies solely on passive components like resistors, capacitors, and inductors. Therefore, the correct answer is Option 4, as it describes a network with one or more sources of e.m.f.

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  • 38. 

    Why is the impulse duration important? a) It is zero b) It changes with time c) It approaches zero d) It depends on the situation

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    The impulse duration is important because it approaches zero. This means that the impulse is applied for a very short duration of time. A shorter impulse duration can result in a higher force being exerted, which can be beneficial in certain situations. Additionally, a shorter impulse duration can also lead to a faster change in momentum, making it important to consider in the study of collisions and other dynamic systems.

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  • 39. 

    Number of PN junctions in JFET are (A) 0 (B) 1 (C) 2    (D) 3

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    JFET stands for Junction Field-Effect Transistor. It is a three-terminal semiconductor device that relies on the control of current by an electric field. In a JFET, there are two PN junctions formed between the differently doped regions of the semiconductor material. These junctions are essential for the operation of the JFET as they control the flow of current. Therefore, the correct answer is option 3, which states that there are two PN junctions in a JFET.

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  • 40. 

    The operation of a JFET involves a flow of      A.Minority carriers    B.Majority carriers    C.Recombination carriers    D.Any of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 2
    Explanation
    The correct answer is B. Majority carriers. In a JFET (junction field-effect transistor), the operation involves the flow of majority carriers, which are the majority charge carriers in the semiconductor material. In an N-channel JFET, the majority carriers are electrons, while in a P-channel JFET, the majority carriers are holes. The flow of majority carriers controls the conductivity of the JFET and allows it to function as a voltage-controlled current device.

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  • 41. 

    A Wein bridge oscillator has R1 = R2 = 220 k? and C1 = C2 = 250 pF.  The frequency of oscillations will be nearly (A) 0.89 kHz (B) 1.89 kHz (C) 2.89 kHz    (D) 3.89 kHz

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    The frequency of oscillations in a Wein bridge oscillator is determined by the values of the resistors and capacitors used in the circuit. In this case, the resistors R1 and R2 have a value of 220 kΩ, and the capacitors C1 and C2 have a value of 250 pF. By using the formula for the frequency of oscillations in a Wein bridge oscillator, which is f = 1 / (2πRC), where R is the total resistance and C is the total capacitance, we can calculate the frequency to be approximately 2.89 kHz.

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  • 42. 

    Transistors have not replaced vacuum tubes because (A) transistors are non-linear (B) transistors do not have grid (C) high power transistors are not available     (D) heat dissipation from transistors is difficult

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    High power transistors are not available.

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  • 43. 

    The Q factor of a series RLC increases if (A) R decreases    (B) R increase (C) impedance increases (D) voltage increases

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    The Q factor of a series RLC circuit is a measure of the quality of the circuit's resonance. It is defined as the ratio of the reactance to the resistance in the circuit. A higher Q factor indicates a more efficient and selective circuit. The reactance in a series RLC circuit is inversely proportional to the resistance, so if the resistance decreases, the reactance increases, leading to a higher Q factor. Therefore, option 1 is the correct answer.

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  • 44. 

    Which of the following transistor is affected by static electricity ? (A) NPN transistor (B) FET (C) UJT (D) MOSFET    

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 4
    Explanation
    MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is affected by static electricity. This is because the gate of a MOSFET is made up of a metal-oxide-semiconductor structure, which is susceptible to damage from static charges. When a static charge is applied to the gate of a MOSFET, it can cause the oxide layer to break down, leading to permanent damage or malfunction of the transistor. Therefore, proper handling and precautions are necessary when working with MOSFETs to prevent damage from static electricity.

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  • 45. 

    Feedback control systems are      A. Insensitive to both forward and feedback path parameter changes    B. Less sensitive to feedback path parameter changes than to forward path parameter changes    C. Less sensitive to forward path parameter changes than to feedback path parameter changes    D. Equally sensitive to forward and feedback path parameter changes

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    Feedback control systems are less sensitive to forward path parameter changes than to feedback path parameter changes. This means that changes in the parameters of the feedback path have a greater impact on the overall system performance compared to changes in the parameters of the forward path.

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  • 46. 

    The forbidden energy gap for silicon is (A) 0.12 eV (B) 1.12 eV (C) 0.72 eV    (D) 0.92 eV

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    The forbidden energy gap for silicon is 0.72 eV. This refers to the energy difference between the valence band and the conduction band in the electronic band structure of silicon. It represents the minimum energy required for an electron to move from the valence band to the conduction band and become a free charge carrier. In other words, it is the energy required to promote an electron from the filled valence band to the empty conduction band.

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  • 47. 

    The most commonly used input signal in control system is/are      A. Step function    B. Ramp or velocity function    C.Accelerating function    D. All of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    The most commonly used input signal in control systems is a step function. A step function is a signal that changes instantaneously from one constant value to another constant value. This type of input signal is commonly used in control systems to analyze the response and stability of the system. It allows for the observation of the system's behavior when there is a sudden change in the input. Ramp or velocity functions and accelerating functions are also used in control systems, but they are not as commonly used as step functions.

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  • 48. 

    A frequency multiplier stage should operate as (A) Class A (B) Class B (C) Class C     (D) Either of the above

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 3
    Explanation
    A frequency multiplier stage should operate as Class C. Class C amplifiers are known for their high efficiency and are commonly used in frequency multiplier circuits. They only conduct for a portion of the input waveform cycle, resulting in high power efficiency. This is important in frequency multiplier circuits as it allows for the generation of higher frequency signals without significant power loss. Class A and Class B amplifiers, on the other hand, are not suitable for frequency multiplier stages due to their lower efficiency and inability to handle high-frequency signals effectively.

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  • 49. 

    Wired channels are a) Lossy b) Lossless c) Lossy & Lossless d) None of the mentioned

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
    Explanation
    Wired channels are lossy because they experience signal degradation and loss of information as the signal is transmitted through the channel. This can be caused by various factors such as resistance, capacitance, and interference. Lossy channels result in a decrease in the quality and integrity of the transmitted signal.

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  • Current Version
  • Mar 15, 2023
    Quiz Edited by
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  • Jul 26, 2020
    Quiz Created by
    Noothan Kumar
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