Electronic Principles MCQ Questions & Answers

21

The knee voltage of a diode is approximately equal to the

A) Applied voltage B) Barrier potential C) Breakdown voltage D) Forward voltage E) None of the above

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Answer & Solution

Answer: Option B

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22

A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?

A) 310 Ohm B) 400 Ohm C) 410 Ohm D) 550 Ohm E) None of the above

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Answer & Solution

Answer: Option C

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23

The rms value of a sine waveform is:

A) the number of cycles completed in one second B) the time required to complete one full cycle C) equal to 0.707 times the peak amplitude D) equal to 1.41 times the peak amplitude E) None of the above

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Answer & Solution

Answer: Option C

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24

Which one of the following is a direct statement of Ohm's law?

A) The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it B) The total resistance of a parallel circuit is less than the value of the smallest resistance C) The algebraic sum of voltages in a loop is equal to zero D) The algebraic sum of currents entering and leaving a point is equal to zero E) None of the above

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Answer & Solution

Answer: Option A

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25

A high-pass filter:

A) passes lower-frequency signals and reduces higher-frequency signals B) passes higher-frequency signals and reduces lower-frequency signals C) has no effect on ac signals D) increases the level of all frequencies by a significant amount E) None of the above

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Answer & Solution

Answer: Option B

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26

Which one of the following statements is true for the voltages in a series RC circuit?

A) The total voltage is equal to the sum of the voltages across the resistance and capacitance B) The voltage always has the same amplitude and phase for every part of the circuit C) The total voltage is less than the sum of the voltages across the resistance and capacitance D) The total voltage is greater than the sum of the voltages across the resistance and capacitance E) None of the above

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Answer & Solution

Answer: Option C

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27

A battery is a device composed of one or more:

A) chemical cells B) voltage generators C) solar cells D) piezoeletric cells E) None of the above

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Answer & Solution

Answer: Option A

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28

Doubling the operating voltage of a purely capacitive circuit:

A) has no effect on the capacitive reactance B) doubles the amount of capacitive reactance C) multiplies the capacitive reactance by 7 D) cuts the capacitive reactance in half E) None of the above

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Answer & Solution

Answer: Option A

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29

How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?

A) 0.02 A B) 0.955 A C) 10:00 AM D) 2.02 A E) None of the above

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Answer & Solution

Answer: Option B

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30

The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor?

A) 250 µA B) 350 µA C) 0.25 µA D) 300 µA E) None of the above

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Answer & Solution

Answer: Option A

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Electronic Principles MCQ Questions & Answers | Computer Science