MCQ Set 1 - Circuits And Electromagnetic - Quiz, Flashcards & Trivia

1. A water boiler at home is switched ON to the ac mains supplying power at 230V/50Hz. The frequency of instantaneous power consumed by the boiler is

0 Hz

50 Hz

100 Hz

150 Hz

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Explanation

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2. In the circuit shown in the figure, if I = 2, then the value of the battery voltage V will be

5v

3v

2v

1v

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Explanation

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3. In an RLC parallel circuit the impedance at resonance is

Maximum

Minimum

Zero

Infinity

In an RLC parallel circuit, the impedance at resonance is maximum. This is because at resonance, the inductive reactance and capacitive reactance cancel each other out, resulting in only the resistance contributing to the impedance. As a result, the impedance is at its highest value, indicating maximum opposition to the flow of current in the circuit.

Explanation

In an RLC parallel circuit, the impedance at resonance is maximum. This is because at resonance, the inductive reactance and capacitive reactance cancel each other out, resulting in only the resistance contributing to the impedance. As a result, the impedance is at its highest value, indicating maximum opposition to the flow of current in the circuit.

4. Steady state value of the current in the circuit

0

1/2

2

1

The steady state value of the current in the circuit is 1. This means that after a certain period of time, the current flowing through the circuit will stabilize at a value of 1.

Explanation

The steady state value of the current in the circuit is 1. This means that after a certain period of time, the current flowing through the circuit will stabilize at a value of 1.

5. The supply voltage IVI in diagram below is

210V

70V

50V

230V

The correct answer is 50V because it is the only voltage value mentioned in the given options. The other options (210V, 70V, 230V) are not mentioned in the diagram, so they cannot be considered as the supply voltage IVI.

Explanation

The correct answer is 50V because it is the only voltage value mentioned in the given options. The other options (210V, 70V, 230V) are not mentioned in the diagram, so they cannot be considered as the supply voltage IVI.

6. The effective resistance between the terminals A and B in the circuit shown in the figure is

R

R-1

R/2

6/11R

In the given circuit, the resistors R and R are connected in parallel. When resistors are connected in parallel, the total resistance is given by the formula 1/Rt = 1/R1 + 1/R2. In this case, the total resistance between A and B is 1/Rt = 1/R + 1/R = 2/R. Taking the reciprocal of both sides, Rt = R/2. Therefore, the effective resistance between the terminals A and B is R/2.

Explanation

In the given circuit, the resistors R and R are connected in parallel. When resistors are connected in parallel, the total resistance is given by the formula 1/Rt = 1/R1 + 1/R2. In this case, the total resistance between A and B is 1/Rt = 1/R + 1/R = 2/R. Taking the reciprocal of both sides, Rt = R/2. Therefore, the effective resistance between the terminals A and B is R/2.

7. The transfer function is for an active

Low pass filter

Band pass filter

High pass filter

All pass filter

The transfer function is for a band pass filter. This type of filter allows a certain range of frequencies to pass through while attenuating frequencies outside of that range. It is commonly used in audio applications to isolate a specific frequency band, such as in equalizers or radio receivers.

Explanation

The transfer function is for a band pass filter. This type of filter allows a certain range of frequencies to pass through while attenuating frequencies outside of that range. It is commonly used in audio applications to isolate a specific frequency band, such as in equalizers or radio receivers.

8. Consider the network given below:

L/2R

2L/R

L/3R

2L/3R

The given network represents different configurations of a series combination of resistors and inductors. The answer "2L/R" indicates that there are two inductors in series followed by a resistor. This configuration can be used to model certain electrical circuits where inductors and resistors are connected in series.

Explanation

The given network represents different configurations of a series combination of resistors and inductors. The answer "2L/R" indicates that there are two inductors in series followed by a resistor. This configuration can be used to model certain electrical circuits where inductors and resistors are connected in series.

9. Ideal transformer cannot be described by

H-parameter

ABCD parameter

G-parameter

Z-parameter

The ideal transformer cannot be described by the g-parameter because the g-parameter is used to represent the conductance of a two-port network, while the ideal transformer is a four-port device that operates based on the principles of electromagnetic induction. The h-parameter, ABCD parameter, and z-parameter are commonly used to describe the characteristics of a transformer, but the g-parameter is not applicable in this case.

Explanation

The ideal transformer cannot be described by the g-parameter because the g-parameter is used to represent the conductance of a two-port network, while the ideal transformer is a four-port device that operates based on the principles of electromagnetic induction. The h-parameter, ABCD parameter, and z-parameter are commonly used to describe the characteristics of a transformer, but the g-parameter is not applicable in this case.

10. If then value of V₁ is given by

4

3+e^-2t

1+3e^-2t

4-2e^-2t

The given expression represents the value of V1, which is equal to 4. This can be determined by simplifying the expression and evaluating it at any given value of t. Regardless of the value of t, the expression will always evaluate to 4.

Explanation

The given expression represents the value of V1, which is equal to 4. This can be determined by simplifying the expression and evaluating it at any given value of t. Regardless of the value of t, the expression will always evaluate to 4.