Round 1 Esdt-l2a Ncet 12-04

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About This Quiz

This quiz, titled 'Round 1 ESDT-L2a NCET 12-04', assesses knowledge on series circuits, focusing on resistor behavior, voltage distribution, and power dissipation. It is ideal for learners in physics or electrical engineering, enhancing understanding of basic circuit principles.

Round 1 Esdt-l2a Ncet 12-04 - Quiz

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  • 2. 

    Does Arduino provides IDE Environment?

    • Yes

    • No

    • Option 3

    • Option 4

    Correct Answer
    A. Yes
    Explanation
    Arduino does provide an IDE (Integrated Development Environment) environment. The Arduino IDE is a software platform that allows users to write, compile, and upload code to Arduino boards. It provides a user-friendly interface for programming Arduino microcontrollers and offers various features such as code highlighting, serial monitor, and library management. With the Arduino IDE, users can easily develop and test their Arduino projects, making it a valuable tool for beginners and experienced developers alike.

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  • 3. 

    What determines the total resistance in a series circuit?

    • The sum of the resistors

    • The largest resistor

    • The largest resistor minus the smaller

    • The smallest resistor

    Correct Answer
    A. The sum of the resistors
    Explanation
    In a series circuit, the total resistance is determined by the sum of the resistors. This is because in a series circuit, the current flowing through each resistor is the same, and the total resistance is the cumulative effect of all the resistors in the circuit. Therefore, to find the total resistance, we add up the individual resistances of all the resistors in the series circuit.

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  • 4. 

    What are the types of linkages?

    • Internal

    • External

    • None

    • External, Internal and None

    Correct Answer
    A. External, Internal and None
    Explanation
    The types of linkages include external, internal, and none. External linkages refer to connections between a program and other programs or libraries outside of its own code. Internal linkages refer to connections within a program, such as between different functions or variables. None indicates that there are no linkages present in the context of the question.

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  • 5. 

    Specify the 2 library functions to dynamically allocate memory?

    • Memalloc() and faralloc()

    • Malloc() and memalloc()

    • Alloc() and memalloc()

    • Malloc() and calloc()

    Correct Answer
    A. Malloc() and calloc()
    Explanation
    The correct answer is malloc() and calloc(). These two library functions are used to dynamically allocate memory in C programming. malloc() is used to allocate a block of memory of a specified size, while calloc() is used to allocate a block of memory for an array of elements, initializing all the elements to 0.

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  • 6. 

    With a 900 V source, voltage is divided across 3 series resistors of 300 V, 280 V, and:

    • 300 V

    • 280 V

    • 320 V

    • 120 V

    Correct Answer
    A. 320 V
    Explanation
    When a voltage source is connected to a series circuit, the total voltage is divided among the resistors based on their individual resistances. In this case, the total voltage is 900 V and it is divided across the three resistors. The first resistor has a voltage drop of 300 V, the second resistor has a voltage drop of 280 V, and the third resistor will have a voltage drop of 320 V. This is because the voltage drop across each resistor is proportional to its resistance. Therefore, the correct answer is 320 V.

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  • 7. 

    MQTT stands for _____________

    • MQ Telemetry Transport

    • MQ Transport Things

    • MQ Transport Telemetry

    • MQ Telemetry Things

    Correct Answer
    A. MQ Telemetry Transport
    Explanation
    MQTT stands for MQ Telemetry Transport. This protocol is designed for lightweight communication between devices in the Internet of Things (IoT) and is widely used in IoT applications. MQTT is known for its simplicity, efficiency, and low bandwidth usage, making it ideal for resource-constrained devices. It enables devices to publish and subscribe to messages on topics, allowing for efficient and reliable data exchange between devices in a network.

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  • 8. 

    What is the microcontroller used in Arduino UNO?

    • ATmega328p

    • ATmega2560

    • ATmega32114

    • AT91SAM3x8E

    Correct Answer
    A. ATmega328p
    Explanation
    The microcontroller used in Arduino UNO is the ATmega328p. This microcontroller is commonly used in Arduino boards due to its low power consumption, high performance, and compatibility with various sensors and peripherals. It has a 32KB flash memory, 2KB SRAM, and 1KB EEPROM, making it suitable for a wide range of applications. Additionally, it has a built-in bootloader, allowing for easy programming and development of Arduino projects.

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  • 9. 

    How will you free the allocated memory ?

    • Remove(var-name);

    • Free(var-name);

    • Dalloc(var-name);

    • Delete(var-name);

    Correct Answer
    A. Free(var-name);
    Explanation
    To free the allocated memory, the correct option is "free(var-name)". The function "free()" is used in C programming language to deallocate the memory previously allocated by the "malloc()" or "calloc()" functions. By calling "free(var-name)", the memory allocated to the variable "var-name" will be released and can be used for other purposes.

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  • 10. 

    Which equation determines individual resistor voltage drop?

    • I x R

    • V x I

    • 2I x R

    • V x R

    Correct Answer
    A. I x R
    Explanation
    The equation I x R determines the individual resistor voltage drop. This equation represents Ohm's Law, where I represents the current flowing through the resistor and R represents the resistance of the resistor. By multiplying the current and resistance values, we can calculate the voltage drop across the resistor.

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  • 11. 

    Input/output function prototypes and macros are defined in which header file?

    • Stdio.h

    • Conio.h

    • Stdlib.h

    • Dos.h

    Correct Answer
    A. Stdio.h
    Explanation
    The correct answer is stdio.h. This header file is commonly used in C programming and contains the prototypes for input/output functions such as printf and scanf. It also includes definitions for file handling functions and constants like NULL. Therefore, if we need to use input/output functions or file handling functions in our program, we need to include stdio.h.

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  • 12. 

    Which of the following special symbol allowed in a variable name?

    • | (pipeline)

    • - (hyphen)

    • _ (underscore)

    • * (asterisk)

    Correct Answer
    A. _ (underscore)
    Explanation
    The underscore (_) symbol is allowed in a variable name.

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  • 13. 

    Which header file should be included to use functions like malloc() and calloc()?

    • Dos.h

    • Stdlib.h

    • String.h

    • Memory.h

    Correct Answer
    A. Stdlib.h
    Explanation
    The correct answer is stdlib.h. This header file should be included to use functions like malloc() and calloc(). The stdlib.h header file in C provides several general-purpose functions, including memory allocation functions like malloc() and calloc(). These functions are used to dynamically allocate memory during runtime. Therefore, including stdlib.h allows the program to access and use these memory allocation functions.

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  • 14. 

    If a 6 V and a 9 V source are connected series aiding, the total voltage is

    • 3v

    • 9v

    • 6v

    • 15v

    Correct Answer
    A. 15v
    Explanation
    When two voltage sources are connected in series aiding, their voltages add up. In this case, the 6 V and 9 V sources are connected in series aiding, so the total voltage would be the sum of these two voltages, which is 15 V.

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  • 15. 

    If series resistors dissipate 16 mW, 107 mW, 146 mW, and 243 mW, what is the total power consumed by the circuit?

    • 269 mW

    • 128 mW

    • 512 mW

    • 1024 mW

    Correct Answer
    A. 512 mW
    Explanation
    The total power consumed by a circuit with series resistors can be found by adding up the power dissipated by each resistor. In this case, the power dissipated by the resistors is 16 mW, 107 mW, 146 mW, and 243 mW. Adding these values together gives a total power consumption of 512 mW.

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  • 16. 

    Which of the following correctly shows the hierarchy of arithmetic operations in C?

    • * - / +

    • + - / *

    • / * + -

    • / + * -

    Correct Answer
    A. / * + -
    Explanation
    The hierarchy of arithmetic operations in C follows the BODMAS rule, which states that division and multiplication should be performed before addition and subtraction. Therefore, the correct hierarchy is / * + - where division is performed first, followed by multiplication, addition, and subtraction.

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  • 17. 

    What is (void*)0?

    • Representation of NULL pointer

    • Error

    • Representation of void pointer

    • None of above

    Correct Answer
    A. Representation of NULL pointer
    Explanation
    (void*)0 is the representation of a NULL pointer. In C and C++, a NULL pointer is a pointer that does not point to any memory location. It is often used to indicate the absence of a valid pointer value. The (void*)0 notation is used to explicitly cast the value 0 to a void pointer type. This is done to indicate that the pointer does not have a specific type associated with it, allowing it to be assigned to pointers of any type. Therefore, (void*)0 is the correct answer as it represents a NULL pointer.

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  • 18. 

    Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is

    • 2A

    • 3A

    • 4A

    • 7A

    Correct Answer
    A. 3A
    Explanation
    In a series circuit, the current remains the same throughout. Therefore, the amount of current into the second resistor will also be 3A.

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  • 19. 

    This component is

    • Capacitor

    • Resistor

    • Inductor

    • Potentiometer

    Correct Answer
    A. Capacitor
    Explanation
    Capacitors are electronic components that store electrical energy in an electric field. They consist of two conductive plates separated by an insulating material called a dielectric. When a voltage is applied across the plates, the capacitor charges up and stores energy. Capacitors are commonly used in electronic circuits for various purposes, such as smoothing out voltage fluctuations, filtering signals, and storing energy for later release. Therefore, the correct answer is Capacitor.

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  • 20. 

    What is the similarity between a structure, union and enumeration?

    • All of them let you define new values

    • All of them let you define new data types

    • All of them let you define new pointers

    • All of them let you define new pointers

    Correct Answer
    A. All of them let you define new data types
    Explanation
    All three structures, unions, and enumerations allow you to define new data types. Structures let you group together different types of variables under a single name, unions let you store different types of variables in the same memory location, and enumerations let you define a set of named constants. Therefore, the similarity between these three is that they all allow you to define new data types.

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  • 21. 

    Does the level shifter converts the voltage levels between RS-232 and transistor-transistor logic.

    • Yes

    • No

    • Option 3

    • Option 4

    Correct Answer
    A. Yes
    Explanation
    A level shifter is a device that is used to convert voltage levels between different types of electronic circuits. In this case, the question is asking whether a level shifter can convert voltage levels between RS-232 and transistor-transistor logic (TTL). The correct answer is "Yes" because a level shifter can indeed perform this conversion, allowing for compatibility between the two different types of circuits.

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  • 22. 

    ___________ are pre built circuit boards that fit on top of Arduino

    • Shields

    • Databoards

    • Sensors

    • Ardu hats

    Correct Answer
    A. Shields
    Explanation
    Shields are pre-built circuit boards that can be easily attached on top of an Arduino board. These shields provide additional functionality to the Arduino by adding specific features or components such as motor drivers, WiFi modules, or LCD displays. They are designed to fit perfectly on top of the Arduino, allowing for easy integration and expansion of the Arduino's capabilities.

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  • 23. 

    What will the function rewind() do?

    • Reposition the file pointer stream to end of file.

    • Reposition the file pointer to a character reverse

    • Reposition the file pointer to begining of that line

    • Reposition the file pointer to begining of file.

    Correct Answer
    A. Reposition the file pointer to begining of file.
    Explanation
    The function rewind() is used to reposition the file pointer to the beginning of the file. This means that after calling the rewind() function, any subsequent read or write operations will start from the beginning of the file.

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  • 24. 

    What function should be used to free the memory allocated by calloc() ?

    • Memalloc(variable_name, 0)

    • Free();

    • Dealloc();

    • Malloc(variable_name, 0)

    Correct Answer
    A. Free();
    Explanation
    The function that should be used to free the memory allocated by calloc() is "free();". The free() function is used to deallocate the memory previously allocated by calloc(). It takes a pointer to the memory block as a parameter and frees the memory, making it available for reuse.

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  • 25. 

    MQTT is better than HTTP in IOT application for sending & receiving data

    • True

    • False

    • Option 3

    • Option 4

    Correct Answer
    A. True
    Explanation
    MQTT is better than HTTP in IoT applications for sending and receiving data because MQTT is a lightweight messaging protocol specifically designed for IoT devices. It uses a publish-subscribe model, allowing for efficient communication between devices with low power and limited bandwidth. HTTP, on the other hand, is a request-response protocol that is more suitable for traditional web-based applications. In IoT scenarios where devices need to constantly exchange data in a resource-constrained environment, MQTT's efficiency and low overhead make it a better choice.

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  • 26. 

    How many analog pins are used in Arduino Mega board?

    • 16

    • 14

    • 12

    • 8

    Correct Answer
    A. 16
    Explanation
    The Arduino Mega board has a total of 16 analog pins. These analog pins can be used to read analog signals, such as sensor values, and convert them into digital values that the Arduino can process. Having 16 analog pins provides a greater flexibility and allows for more analog inputs to be connected to the board.

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  • 27. 

    Is a symbol of

    • LED

    • LDR

    • Capacitor

    • None of these

    Correct Answer
    A. LED
    Explanation
    The correct answer is LED. LED stands for Light Emitting Diode, which is a semiconductor device that emits light when an electric current passes through it. LEDs are commonly used in various electronic devices and lighting applications due to their energy efficiency and long lifespan. Therefore, an LED can be considered as a symbol of modern lighting technology.

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  • 28. 

    How many digital pins are there in the UNO board?

    • 14

    • 12

    • 16

    • 20

    Correct Answer
    A. 14
    Explanation
    The UNO board has a total of 14 digital pins. These pins can be used for both input and output purposes. They allow the board to communicate with other devices and sensors, and can be used to control various components such as LEDs, motors, and buttons.

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  • 29. 

    The binary equivalent of 5.375 is

    • 101.101110111

    • None of above

    • 101011

    • 101.011

    Correct Answer
    A. 101.011
    Explanation
    The binary equivalent of a decimal number can be found by repeatedly multiplying the decimal part by 2 and taking the integer part as the binary digit. In this case, the decimal part of 5.375 is 0.375. Multiplying 0.375 by 2 gives 0.75, with an integer part of 0. Multiplying 0.75 by 2 gives 1.5, with an integer part of 1. Multiplying 0.5 by 2 gives 1, with an integer part of 1. Therefore, the binary equivalent of 5.375 is 101.011.

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  • 30. 

    Arduino IDE consists of 2 functions. What are they

    • Build() and loop()

    • Setup() and build()

    • Setup() and loop()

    • Loop() and build() and setup()

    Correct Answer
    A. Setup() and loop()
    Explanation
    The correct answer is Setup() and loop(). The Setup() function is used to initialize variables, pin modes, and libraries, and it is called only once when the Arduino board is powered on or reset. The loop() function is the main function in Arduino programming, and it is called repeatedly after the Setup() function. It contains the code that you want to run repeatedly, such as reading inputs and controlling outputs.

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  • 31. 

    A series circuit schematic is recognized because all the components are connected:

    • End to end in a "string"

    • Horizontally across the page

    • In a uniform vertical manner

    • Diagonally across the page

    Correct Answer
    A. End to end in a "string"
    Explanation
    In a series circuit, all the components are connected in a single path, one after the other, like a string. This means that the current flows through each component in the same direction, and if one component fails, the entire circuit will be broken. Therefore, the correct answer is "end to end in a 'string'."

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  • 32. 

    In a series circuit, the voltage measured across a short will be:

    • The normal voltage drop

    • Zero volts

    • Source voltage

    • Infinite voltage

    Correct Answer
    A. Zero volts
    Explanation
    In a series circuit, the voltage measured across a short will be zero volts. This is because a short circuit provides a path of very low resistance, causing all of the current to flow through the short and bypass the rest of the circuit. As a result, there is no voltage drop across the short circuit itself.

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  • 33. 

    Power is defined as:

    • Joules

    • The conversion of energy

    • Work

    • The rate at which work is done

    Correct Answer
    A. The rate at which work is done
    Explanation
    Power is a measure of how quickly work is done or energy is transferred. It represents the rate at which work is done, meaning how much work is done per unit of time. It is not just the conversion of energy or the total amount of work done, but specifically the rate at which work is being done. Therefore, the correct answer is "the rate at which work is done".

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  • 34. 

    A series circuit current:

    • Remains the same through each component

    • Is the same as the individual resistances

    • Varies through each component

    • Is subtracted by each component

    Correct Answer
    A. Remains the same through each component
    Explanation
    In a series circuit, the current remains the same through each component because there is only one path for the current to flow. The total resistance in a series circuit is equal to the sum of the individual resistances, but the current remains constant throughout the circuit. This is because the amount of current flowing into one component is equal to the amount of current flowing out of that component, ensuring that the current remains the same throughout the circuit.

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  • 35. 

    What will you do to treat the constant 3.14 as a float?

    • Use 3.14f

    • Use (f)(3.14)

    • Use float(3.14f)

    • Use f(3.14)

    Correct Answer
    A. Use 3.14f
    Explanation
    To treat the constant 3.14 as a float, you can use the suffix "f" after the number. This indicates that the number should be treated as a float data type.

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  • 36. 

    How many bytes are occupied by near, far and huge pointers (DOS)?

    • Near=4 far=4 huge=8

    • Near=2 far=4 huge=4

    • Near=4 far=8 huge=8

    • Near=2 far=4 huge=8

    Correct Answer
    A. Near=2 far=4 huge=4
    Explanation
    Near pointers occupy 2 bytes of memory, far pointers occupy 4 bytes of memory, and huge pointers also occupy 4 bytes of memory.

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  • 37. 

    What does p refer to in ATmega328p

    • Production

    • Pico-Power

    • Power-Pico

    • Programmable on chip

    Correct Answer
    A. Pico-Power
    Explanation
    In the ATmega328p, the "p" refers to Pico-Power. Pico-Power is a feature in microcontrollers that allows for ultra-low power consumption, making it ideal for battery-powered applications. This feature enables the microcontroller to operate at very low power levels, extending battery life and reducing energy consumption.

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  • 38. 

    A program written with the IDE for Arduino is called _________

    • Sketch

    • Code

    • Crypt

    • IDE Source

    Correct Answer
    A. Sketch
    Explanation
    In the context of Arduino programming, a program written with the IDE for Arduino is called a "Sketch". This term is commonly used to refer to the code written for Arduino boards. It is a concise and straightforward way to describe the program, emphasizing the simplicity and ease of use associated with the Arduino platform.

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  • 39. 

    What will the function randomize() do in Turbo C under DOS?

    • Returns a random number generator in the specified range.

    • Returns a random number generator with a random value based on time.

    • Returns a random number.

    • Return a random number with a given seed value.

    Correct Answer
    A. Returns a random number generator with a random value based on time.
    Explanation
    The function randomize() in Turbo C under DOS will return a random number generator with a random value based on time. This means that each time the function is called, it will generate a different random value based on the current time.

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  • 40. 

    If a 24 V and a 6 V battery are series opposing, the total voltage is

    • 18v

    • 30v

    • 24v

    • 20v

    Correct Answer
    A. 18v
    Explanation
    When two batteries are connected in series opposing, it means that their positive terminals are connected to each other and their negative terminals are connected to each other. In this case, the 24 V battery and the 6 V battery are connected in series opposing. When batteries are connected in this way, the total voltage is equal to the difference between the voltages of the two batteries. So, the total voltage in this case would be 24 V - 6 V = 18 V.

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  • 41. 

    If the resistance total in a series circuit doubles, current will:

    • Be doubled

    • Be halved

    • Be the same

    • Reduce source voltage

    Correct Answer
    A. Be halved
    Explanation
    When the resistance total in a series circuit doubles, the current will be halved. This is because according to Ohm's Law, the current flowing through a circuit is inversely proportional to the total resistance. Therefore, if the resistance doubles, the current will decrease by half.

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  • 42. 

    In mathematics and computer programming, which is the correct order of mathematical operators ?

    • Multiplication, Addition, Division, Subtraction

    • Division, Multiplication, Addition, Subtraction

    • Addition, Division, Modulus, Subtraction

    • Addition, Subtraction, Multiplication, Division

    Correct Answer
    A. Division, Multiplication, Addition, Subtraction
    Explanation
    The correct order of mathematical operators is based on the concept of the order of operations. According to the order of operations, multiplication and division should be performed before addition and subtraction. This means that any multiplication or division should be done before any addition or subtraction in an expression. Therefore, the correct order of mathematical operators is Division, Multiplication, Addition, Subtraction.

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  • 43. 

    In which stage the following code #include gets replaced by the contents of the file stdio.h

    • During linking

    • During editing

    • During execution

    • During preprocessing

    Correct Answer
    A. During preprocessing
    Explanation
    During preprocessing, the code undergoes a series of transformations before it is compiled. This includes the step of replacing the #include directive with the contents of the specified file (in this case, stdio.h). This is done by the preprocessor, which is a separate program that runs before the actual compilation process. The preprocessor scans the code, processes the directives, and prepares the code for compilation. Therefore, the inclusion of the file contents happens during preprocessing.

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  • 44. 

    A string of resistors in a series circuit will:

    • Divide the source voltage in proportion to their values

    • Cause the current to divide

    • Reduce the power to zero

    • Increase the source voltage in proportion to the values

    Correct Answer
    A. Divide the source voltage in proportion to their values
    Explanation
    In a series circuit, resistors are connected end to end, so the same current flows through each resistor. According to Ohm's Law, the voltage across a resistor is directly proportional to its resistance. Therefore, in a series circuit, the total voltage of the source is divided among the resistors in proportion to their individual values. This is why the correct answer is "divide the source voltage in proportion to their values".

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  • 45. 

    How would you round off a value from 1.66 to 2.0?

    • Roundup(1.66)

    • Floor(1.66)

    • Roundto(1.66)

    • Ceil(1.66)

    Correct Answer
    A. Ceil(1.66)
    Explanation
    The ceil() function is used to round up a value to the nearest whole number. In this case, rounding up 1.66 will result in 2.0.

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  • 46. 

    Which protocol is lightweight?

    • MQTT

    • HTTP

    • CoAPP

    • SPI

    Correct Answer
    A. MQTT
    Explanation
    MQTT is a lightweight protocol designed for efficient communication between devices with limited resources, such as sensors and small microcontrollers. It is known for its small code footprint, low bandwidth usage, and minimal processing requirements. MQTT uses a publish-subscribe model, allowing devices to subscribe to topics and receive messages only when they are relevant. In contrast, HTTP is a more heavyweight protocol primarily used for web communication, CoAPP is a lightweight protocol but not as widely adopted as MQTT, and SPI is a communication protocol used for connecting devices within a circuit.

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  • 47. 

    When a fourth resistor is connected in series with three resistors, the total resistance

    • Increases

    • Increases by one-fourth

    • Decreases

    • Remains the same

    Correct Answer
    A. Increases
    Explanation
    When a fourth resistor is connected in series with three resistors, the total resistance increases. This is because when resistors are connected in series, their resistances add up. Adding a fourth resistor means there is more resistance in the circuit, resulting in an overall increase in total resistance.

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  • 48. 

    If series current doubles, then:

    • Voltage is doubled

    • Resistance is halved

    • Voltage is reduced

    • Resistance is doubled

    Correct Answer
    A. Resistance is halved
    Explanation
    When the series current doubles, it means that more current is flowing through the circuit. According to Ohm's Law (V = IR), the voltage (V) across a resistor is directly proportional to the current (I) flowing through it. Therefore, if the current doubles, the voltage across the resistor will also double. On the other hand, the resistance (R) in the circuit is inversely proportional to the current. So, if the current doubles, the resistance will be halved.

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  • 49. 

    What does the following declaration mean? int (*ptr)[10];

    • Ptr is array of pointers to 10 integers

    • Ptr is an array of 10 integers

    • Ptr is a pointer to an array of 10 integers

    • Ptr is an pointer to array

    Correct Answer
    A. Ptr is a pointer to an array of 10 integers
    Explanation
    The declaration "int (*ptr)[10]" means that "ptr" is a pointer to an array of 10 integers. The parentheses around "*ptr" indicate that "ptr" is a pointer, and the "[10]" indicates that it is a pointer to an array of size 10.

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