Electronic Principles MCQ Questions & Answers

21

The net charge of a neutral copper atom is

A) 0 B) 1 C) -1 D) 4 E) None of the above

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Answer & Solution

Answer: Option B

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22

Which one of the following statements is true for the voltage in a parallel RL circuit?

A) The voltage always has the same amplitude and phase for every part of the circuit B) The total voltage is equal to the sum of the voltages across the resistance and inductance C) The total voltage lags the total current by less than 90 D) The total voltages is less than the sum of the voltages across the resistance and inductance E) None of the above

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Answer & Solution

Answer: Option A

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23

A low-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) reduces the level of all frequencies by a significant amount E) None of the above

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Answer & Solution

Answer: Option A

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24

What is one important thing transistors do?

A) Emit light B) Amplify weak signals C) Regulate voltage D) Rectify line voltage E) None of the above

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Answer & Solution

Answer: Option B

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25

At room temperature an intrinsic silicon crystal acts approximately like

A) a battery B) a conductor C) an insulator D) a piece of copper wire E) None of the above

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Answer & Solution

Answer: Option C

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26

What is the algebraic sum of this series of values:+2, -3, -6,+4?

A) -6 B) -3 C) 0 D) 2 E) None of the above

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Answer & Solution

Answer: Option B

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27

When operating below its resonant frequency, a parallel RLC circuit has the characteristics of a:

A) parallel RL circuit B) parallel RC circuit C) parallel RLC circuit operated above its resonant frequency D) purely resistive circuit E) None of the above

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Answer & Solution

Answer: Option A

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28

What causes the depletion layer?

A) Doping B) Recombination C) Barrier potential D) Ions E) None of the above

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Answer & Solution

Answer: Option C

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29

Which one of the following statements most accurately reflects the nature of ac power?

A) The current in an ac circuit flows in one direction, but changes value periodically B) The current in an ac circuit flows in one direction at a steady level C) The current in an ac circuit changes direction periodically D) The current in an ac circuit flows in two directions at the same time E) None of the above

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Answer & Solution

Answer: Option C

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30

A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

A) 700 V B) 707 V C) 651 V D) 208 V E) None of the above

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Answer & Solution

Answer: Option C

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Electronic Principles MCQ Questions & Answers | Computer Science