Computer Science - Electronic Principles

Exercise :: Electronic Principles - Section 3

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

Explanation:

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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

Explanation:

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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

Explanation:

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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

Explanation:

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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