Alternating Current vs Direct Current - General Questions (3)

Directions to Solve

Alternating Current vs Direct Current - General Questions

17.

If a voltmeter measures a sine wave as 500 mV, what would be its average value?

A.	159.0 mV
B.	318.5 mV
C.	353.5 mV
D.	451.0 mV

Answer: Option D

Explanation:

Some AC Voltage Conversion:

Peak to rms: multiply peak by 0.707.

Peak to average: multiply peak by 0.637.

Rms to peak: multiply rms by 1.414.

Rms to average: multiply rms by 0.9.

Average to rms: multiply avg by 1.111.

Average to peak: multiply avg by 1.567.

Mostly voltmeter shows rms value. So, Vav = 0.9*Vrms

= 0.9*500.

= 450mV ~ [D] 451 mV.

18.

AC effective voltage is named:

A.	average
B.	peak
C.	peak-to-peak
D.	root mean square

Answer: Option D

Explanation:

No answer description available for this question

19.

What term expresses the frequency of a rectangular wave?

A.	Hz
B.	period
C.	PRF
D.	PRT

Answer: Option C

Explanation:

No answer description available for this question

20.

If a sine wave signal is 100 mV peak-to-peak, how many volts would be measured by a voltmeter?

A.	14.14 mV
B.	35.4 mV
C.	63.7 mV
D.	70.7 mV

Answer: Option B

Explanation:

No answer description available for this question.

21.

The phase difference between sine waves of different frequencies is:

A.	equal to their frequency differences
B.	the difference in their fixed time displacement
C.	the same throughout time
D.	constantly changing

Answer: Option B

Explanation:

No answer description available for this question

22.

If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?

A.	100 Hz
B.	1000 Hz
C.	10 kHz
D.	100 kHz

Answer: Option D

Explanation:

No answer description available for this question

23.

Power companies supply ac, not dc, because

A.	it is easier to transmit ac
B.	there is no longer a need for dc
C.	dc is more dangerous
D.	there are not enough batteries

Answer: Option A

Explanation:

No answer description available for this question

24.

Power companies supply ac, not dc, because:

A.	it is easier to transmit ac
B.	there is no longer a need for dc
C.	dc is more dangerous
D.	there are not enough batteries

Answer: Option A

Explanation:

No answer description available for this question

Alternating Current vs Direct Current - General Questions (3)

Alternating Current vs Direct Current - General Questions

Questions & Answers

Interviews

Jobs

Results

Admission

Admit Card

Answer Key