Electronic Principles MCQ Questions & Answers

31

A device that converts chemical energy to electrical energy is called a:

A) solar cell B) thermocouple C) chemical cell D) electric device E) None of the above

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Answer & Solution

Answer: Option C

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32

Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value?

A) 37.4 V B) 35.4 V C) 38.74 V D) 30.4 V E) None of the above

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Answer & Solution

Answer: Option B

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33

What is the difference between a conductor and an insulator?

A) A conductor allows current to flow much easier than an insulator does B) An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all C) An insulator allows current to flow much easier than a conductor does D) The difference between conductors and insulators depends on how they are used E) None of the above

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Answer: Option A

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34

A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

A) 15 V B) 16 V C) 7.5 V D) 8 V E) None of the above

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Answer & Solution

Answer: Option A

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35

At room temperature an intrinsic semiconductor has

A) a few free electrons and holes B) many holes C) many free electrons D) No holes E) None of the above

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Answer & Solution

Answer: Option A

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36

If the base supply voltage increases, the Q point moves

A) down B) up C) nowhere D) off the load line E) None of the above

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Answer & Solution

Answer: Option A

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37

Positive ions are atoms that have

A) Gained a proton B) Lost a proton C) Gained an electron D) Lost an electron E) None of the above

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Answer & Solution

Answer: Option D

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38

Which one of the following is a statement of Kirchhoffs current law?

A) The current through a resistance is proportional to the value of resistance and the IR drop across it B) The total current in a parallel circuit is less than the value of the smallest current C) The algebraic sum of currents 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 C

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39

Which one of the following statements is true?

A) inductive reactance decreases with operating frequency B) inductive reactance is at a maximum for dc source voltages C) inductive reactance increases with operating frequency D) There is no meaningful relationship between inductive reactance and operating frequency E) None of the above

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Answer: Option C

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40

A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

A) 200 mW B) 300 mW C) 20 mW D) 10 mW 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