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Worksheets

Alternating Current

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Frequency is measured in ________

a)

Farads

b)

Henrys

c)

Hertz

d)

Freques

2.

What is the amount of time necessary to complete one cycle if the waveform has a frequency of 200Hz?

a)

5ms

b)

10ms

c)

3ms

d)

12ms

3.

What is defined as the amount of time to complete one full waveform?

a)

Cycle

b)

Period

c)

Frequency

d)

Hertz

4.

What is defined as the number of occurrences of a repeating waveform per sec?

a)

Cycle

b)

Period

c)

Frequency

d)

Hertz

5.

What is the peak voltage if you have 120 volts RMS?

a)

84.87v

b)

120v

c)

169.68v

d)

76.44v

6.

What is the frequency if an ac waveform completes a cycle every 16.66ms?

a)

60MHz

b)

100Hz

c)

120Hz

d)

60Hz

7.

Which of the following is NOT 0v on an AC waveform?

a)

0 degrees

b)

90 degrees

c)

180 degrees

d)

360 degrees

8.

What is the RMS voltage if you have 400 volts Peak?

a)

282.89v

b)

347v

c)

240v

d)

312.59v

9.

What is the AVG voltage if you have 48 volts RMS?

a)

24v

b)

56.23v

c)

30v

d)


43.2v


10.

What is the AVG voltage if you have 848.4 volts Peak?

a)

600v

b)

540.43v

c)

477v

d)

689.23v

11.

In a triangle wave, voltage increases at a _____ rate with respect to time.

a)

Non-Linear

b)

Sinusoidal

c)

Linear

d)

Circular

12.

What is the peak voltage if you have 249.5 volts AVG?

a)

367.59v

b)

277.22v

c)

391.68v

d)

300v

13.

What effect occurs when eddy currents into the conductor cause the electrons to be repelled toward the outer surface of the conductor.

a)

Butterfly

b)

Skin

c)

Accelorator

d)

Tesla

14.

What is the RMS voltage if you have 432 volts AVG?

a)

600v

b)

347v

c)

450v

d)

480v

15.

The amplitude of a sine wave is also known as what?

a)

RMS

b)

Middle

c)

Average

d)

Peak

16.

What is the instantaneous voltage along a sine wave at 150 degrees if the peak voltage of the sine wave is 200 volts?

a)

200v

b)

150v

c)

120v

d)

100v

17.

What type of wave is this?

a)

Triangle

b)

Sine

c)

Cosine

d)

Square

18.

What is the peak value of a sine wave if the instantaneous voltage is 68 volts at 53.13 degrees?

a)

85v

b)

90v

c)

100v

d)

120v

19.

DC can be transformed

a)

True

b)

False

20.

What is the angle in a sine wave if the instantaneous voltage is 300 volts and the peak voltage is 347volts?

a)

90 degrees

b)

47.96 degrees

c)

59.83 degrees

d)

0 degrees