# Electronics - Alternating Current vs Direct Current

### Exercise :: Alternating Current vs Direct Current - General Questions

26.

The power that is distributed from a power plant to your home is:

 A. high voltage to high voltage B. low voltage to high voltage C. high voltage to low voltage D. low voltage to low voltage

Explanation:

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27.

A rectangular wave that has a duty cycle of 50 percent could be called a:

 A. c wave B. sawtooth wave C. square wave D. triangle wave

Explanation:

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28.

A triangle wave consists of repeating:

 A. positive ramps only B. negative ramps only C. positive and negative ramps of equal value D. positive and negative ramps of unequal value

Explanation:

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29.

What is the name of a device used to directly measure the frequency of a periodic wave?

 A. oscilloscope B. frequency meter or counter C. audio frequency generator D. radio frequency generator

Explanation:

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30.

Which control should be moved to display more cycles of a signal on an oscilloscope?

 A. horizontal position to left or right B. volts/cm to a smaller number C. vertical position to top or bottom D. time/cm to a higher setting