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


1.
The peak value of an alternating current is 10 A. What is its RMS value?
A.
7.07 A
B.
5 A
C.
10 A
D.
None of these
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ANSWER :
A. 7.07 A
2.
If the peak value of an AC voltage is Vβ‚€, its RMS value is given by:
A.
Vβ‚€/2
B.
Vβ‚€/√2
C.
Vβ‚€βˆš2
D.
Vβ‚€Ο€
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ANSWER :
B. Vβ‚€/√2
3.
The average value of a full-wave rectified sine wave over one complete cycle is:
A.
Zero
B.
Vβ‚€
C.
Vβ‚€/2
D.
Vβ‚€/Ο€
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ANSWER :
D. Vβ‚€/Ο€
4.
For an AC circuit, reactance is due to:
A.
Only resistance
B.
Inductance and capacitance
C.
Only capacitance
D.
Only inductance
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ANSWER :
B. Inductance and capacitance
5.
Which of the following components contributes to reactance in an AC circuit?
A.
Resistors
B.
Inductors
C.
Capacitors
D.
All of these
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ANSWER :
D. All of these
6.
The unit of reactance is:
A.
Volt
B.
Ohm
C.
Farad
D.
Henry
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ANSWER :
B. Ohm