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Objective Questions
ITI
Electrician
Electrician Set-1
Alternating Current
9

Alternating Current MCQ - Electrician (Set-1) with Answers

9) The r.m.s value of A.C. is equal to :

0.637 of max. value

0.707 of max. value

1.414 of max. value

the maximum value

Answer is:

0.707 of max. value

Explanation:

The r.m.s value of A.C. is equal to 0.707 of max. value.

The r.m.s value of A.C. is equal to :

Alternating Current MCQ - Electrician (Set-1) with Answers

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Related Alternating Current MCQ - Electrician (Set-1) with Answers

10) The value of form factor for a pure sine-wave is :

1.414

0.707

0.637

1.11

Answer is:

1.11

Explanation:

For a pure sinusoidal waveform the Form Factor will always be equal to 1.11.

11) If the voltage and current have a phase difference of 90 degree in an A.C. circuit, the power will be :

maximum

minimum

1.1 x V x I

zero

Answer is:

zero

12) Which one of the following frequencies has the longest time period ?

1 Hz.

10 Hz.

1 kHz.

100 kHz.

Answer is:

1 Hz.

13) The total voltage in a series R - L circuit leads the current by an angle :

of 90 Degree

between 0 Degree and 90 Degree

between 90 Degree and 180 Degree

between 0 Degree and 360 Degree

Answer is:

between 0 Degree and 90 Degree

Alternating Current MCQ - Electrician (Set-1) with Answers

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