# Physics Alternating Current Test Online Preparation Mcqs

## Physics Alternating Current Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. A pure variable resistor is connected in series with a pure capacitor of fixed capacitance. The impedance of the circuit _____.
A.
B.
C.
D.

Question 1 of 15

Question 2 of 15

2. The value of the steady current, which when flowing through the same resistor produces heat at the same rate as the mean rate of heat produced by the alternating current, is _______
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B.
C.
D.

Question 2 of 15

Question 3 of 15

3. When a pure inductor of inductance L, and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V, the potential difference across both L&C will be ______.
A.
B.
C.
D.

Question 3 of 15

Question 4 of 15

4. The phase angle between the voltage and the current in an AC circuit consisting of a resistance is:
A.
B.
C.
D.

Question 4 of 15

Question 5 of 15

5. Choose the correct statement. In the case of AC circuit, ohm’s law holds for ______
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B.
C.
D.

Question 5 of 15

Question 6 of 15

6. An alternating current of r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing 10Ω resistor. The peak current is then ______.
A.
B.
C.
D.

Question 6 of 15

Question 7 of 15

7. An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil, the applied voltage leads the current by 45°. What is the inductance of the coil?
A.
B.
C.
D.

Question 7 of 15

Question 8 of 15

8. In an LCR series circuit, if V is the effective value of the applied voltage, VR is the voltage across R, VL is the effective voltage across L & Vc is the effective voltage across C then
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B.
C.
D.

Question 8 of 15

Question 9 of 15

9. Maxwell derived mathematically that the velocity of the electromagnetic waves is ________.
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B.
C.
D.

Question 9 of 15

Question 10 of 15

10. A changing magnetic flux produces around itself and induced ______.
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B.
C.
D.

Question 10 of 15

Question 11 of 15

11. Electromagnetic waves travel in free space with the speed of _______.
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B.
C.
D.

Question 11 of 15

Question 12 of 15

12. Electromagnetic waves consists of _________.
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B.
C.
D.

Question 12 of 15

Question 13 of 15

13. An inductor may store energy in _________
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B.
C.
D.

Question 13 of 15

Question 14 of 15

14. Waves emitted from the antenna are ________.
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B.
C.
D.

Question 14 of 15

Question 15 of 15

15. A wire of resistance R is coil inductivity so that its inductance is L. The impedance of the coil at a frequency of f is:
A.
B.
C.
D.

Question 15 of 15