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?
A.
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:
A.
B.
C.
D.

Question 2 of 15

Question 3 of 15

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

Question 4 of 15

Question 5 of 15

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

Question 6 of 15

Question 7 of 15

7. Electromagnetic waves consists of _________.
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
A.
B.
C.
D.

Question 8 of 15

Question 9 of 15

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

Question 9 of 15

Question 10 of 15

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

Question 10 of 15

Question 11 of 15

11. A choke coil has
A.
B.
C.
D.

Question 11 of 15

Question 12 of 15

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

Question 14 of 15

Question 15 of 15

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

Question 15 of 15


 

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