Hi friends, these are some of the multiple choice questions on electrical circuits. These are some of the basic questions which are asked in previous competitive papers check out and comment...
1) The distance between the c apacitor plates increases two times, then its capacitance
A) Increases two times
B) Increases four times
C) Decreases two times
D) Decreases four times
Ans:C
2) The ratio between the active power and the apparent power of a load in an ac circuit is called
A) Quality factor
B) Power factor
C) Power ratio
D) Power reactive
Ans:B
3) When the power factor of a circuit is Zero,
A) Power absorbed is maximum
B) Power absorbed is minimum
C) Power absorbed is zero
D) The impedance is minimum
Ans:C
4) How many degrees of phase represents one full cycle?
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1) The distance between the c apacitor plates increases two times, then its capacitance
A) Increases two times
B) Increases four times
C) Decreases two times
D) Decreases four times
Ans:C
2) The ratio between the active power and the apparent power of a load in an ac circuit is called
A) Quality factor
B) Power factor
C) Power ratio
D) Power reactive
Ans:B
3) When the power factor of a circuit is Zero,
A) Power absorbed is maximum
B) Power absorbed is minimum
C) Power absorbed is zero
D) The impedance is minimum
Ans:C
4) How many degrees of phase represents one full cycle?
A) 360
B) 180
C) 270
D) 90
Ans:A
B) 180
C) 270
D) 90
Ans:A
5) Which of the following does not generally affect the value of a capacitor?
A) The dielectric material used
B) The surface area of the plates
C) The thickness of the dielectric
D) The voltage applied to the plate
Ans:D
D) The voltage applied to the plate
Ans:D
6) What is the purpose of a load in an electric circuit?
A) To increase the circuit current
B) To decrease the circuit current
C) To utilize electrical energy
C) To utilize electrical energy
D) To make the circuit complete
Ans:C
Ans:C
7) The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To increase the power to 100 %, it is necessary to add .................. to the circuit.
A) Inductance
B) Capacitance
C) Resistance
D) Impedance
Ans:A
D) Impedance
Ans:A
8) Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
A) Skin effect
B) Night effect
C) Edge effect
C) Edge effect
D) Hall effect
Ans:C
Ans:C
9) If voltage across the plates of 2 F capacitor is increased by 4 V, then charge on the plates will
A) Decrease by 2 C
B) Increase by 2 C
C) Decrease by 4 C
D) Increase by 4 C
Ans:D
D) Increase by 4 C
Ans:D
10) What does a capacitor store?
A) Voltage
B) Charge
B) Charge
C) Current
D) Power
Ans:B
Ans:B
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