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 10Ω electric heater is connected to a 220V, 50Hz mains supply. What is the peak value of the potential difference across the heater element?
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B.
C.
D.

Question 1 of 15

Question 2 of 15

2. An A.C series circuit contain 4Ω resistance and 3-Ω inductive resistance. The impedance of the circuit is:
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B.
C.
D.

Question 2 of 15

Question 3 of 15

3. Natural or resonant frequency of an LC circuit is _________.
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B.
C.
D.

Question 3 of 15

Question 4 of 15

4. An alternating current is represented by the equation I = Iosinωt, which of the following equation represents an alternating current of frequency and amplitude twice that of the above current?
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B.
C.
D.

Question 4 of 15

Question 5 of 15

5. Ammeter connected in an AC circuit measures _______.
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B.
C.
D.

Question 5 of 15

Question 6 of 15

6. What is the self inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1?
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B.
C.
D.

Question 6 of 15

Question 7 of 15

7. Electromagnetic waves consists of _________.
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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.
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D.

Question 8 of 15

Question 9 of 15

9. The direction of propagation of an electromagnetic waves is _______.
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B.
C.
D.

Question 9 of 15

Question 10 of 15

10. Average value of current and voltage over a cycle of AC is
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B.
C.
D.

Question 10 of 15

Question 11 of 15

11. A choke coil has
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D.

Question 11 of 15

Question 12 of 15

12. In capacitive circuit, the current _________.
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B.
C.
D.

Question 12 of 15

Question 13 of 15

13. An alternating current of r.m.s value of 2A and a steady direct current I flowing through identical resistors dissipate heat at the same rate. What is the current I?
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B.
C.
D.

Question 13 of 15

Question 14 of 15

14. At resonance the value of the power factor in an L-C-R series circuit is ______
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B.
C.
D.

Question 14 of 15

Question 15 of 15

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

Question 15 of 15

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