Home Physics Alternating Current Test Online Preparation Mcqs

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

Question 1 of 15

Question 2 of 15

2. 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 2 of 15

Question 3 of 15

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

Question 3 of 15

Question 4 of 15

4. 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 4 of 15

Question 5 of 15

5. An ideal choke would be
A.
B.
C.
D.

Question 5 of 15

Question 6 of 15

6. 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 6 of 15

Question 7 of 15

7. The frequency of a circuit consisting of a capacitance C and resistor R is ________.
A.
B.
C.
D.

Question 7 of 15

Question 8 of 15

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

Question 8 of 15

Question 9 of 15

9. 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 9 of 15

Question 10 of 15

10. Waves emitted from the antenna are ________.
A.
B.
C.
D.

Question 10 of 15

Question 11 of 15

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

Question 11 of 15

Question 12 of 15

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

Question 12 of 15

Question 13 of 15

13. To find the r.m.s value of an alternating current mathematically, we need to have ______
A.
B.
C.
D.

Question 13 of 15

Question 14 of 15

14. 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 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


 

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