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. An electromagnetic wave consists of _________.
A.
B.
C.
D.

Question 2 of 15

Question 3 of 15

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

Question 3 of 15

Question 4 of 15

4. In capacitive circuit, the current _________.
A.
B.
C.
D.

Question 4 of 15

Question 5 of 15

5. 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 5 of 15

Question 6 of 15

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

Question 6 of 15

Question 7 of 15

7. A capacitor of capacitance 30μF is charged by a constant current of 10mA. If initially the capacitor was uncharged, what is the time taken for the potential difference across the capacitor to reach300V?
A.
B.
C.
D.

Question 7 of 15

Question 8 of 15

8. 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 _______
A.
B.
C.
D.

Question 8 of 15

Question 9 of 15

9. 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 9 of 15

Question 10 of 15

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

Question 10 of 15

Question 11 of 15

11. When a voltage V = Vo cos ωt is applied across a resistor of resistance R, the average power dissipated per cycle in the resistor is given by ________.
A.
B.
C.
D.

Question 11 of 15

Question 12 of 15

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

Question 12 of 15

Question 13 of 15

13. 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 13 of 15

Question 14 of 15

14. 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 14 of 15

Question 15 of 15

15. 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 15 of 15


 

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