Alternating Currents( Peak and RMS value of Alternating Current/ Voltage: Reactance and Impedance) NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Alternating Currents( Peak and RMS value of Alternating Current/ Voltage: Reactance and Impedance) MCQ Questions


13.
If the frequency of AC is doubled, the inductive reactance:
A.
Doubles
B.
Halves
C.
Remains the same
D.
Quadruples
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ANSWER :
A. Doubles
14.
If the frequency of AC is doubled, the capacitive reactance:
A.
Doubles
B.
Halves
C.
Becomes zero
D.
Becomes infinite
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ANSWER :
B. Halves
15.
The phase difference between current and voltage in a purely resistive circuit is:
A.
0°
B.
90°
C.
180°
D.
45°
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ANSWER :
A. 0°
16.
Which of the following statements about RMS value is true?
A.
It is always greater than the peak value
B.
It is always less than the peak value
C.
It is equal to the peak value
D.
It is the same as the average value
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ANSWER :
B. It is always less than the peak value
17.
The peak value of an AC voltage is 311 V. What is its RMS value?
A.
220 V
B.
110 V
C.
155.5 V
D.
None of these
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ANSWER :
C. 155.5 V
18.
The average value of a sinusoidal AC over a complete cycle is:
A.
Zero
B.
V₀
C.
V₀/π
D.
V₀√2
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ANSWER :
A. Zero