Electrical Energy and Power NEET Questions

Physics - Current Electricity

Electrical Energy and Power MCQ Questions


7.
What happens to the power dissipated when the resistance of a circuit is doubled while keeping the current constant?
A.
Halves
B.
Doubles
C.
Quadruples
D.
Remains the same
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ANSWER :
B. Doubles
8.
Which formula correctly represents electrical power in terms of resistance and current?
A.
P = IR
B.
P = I²R
C.
P = V²R
D.
P = V/I
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ANSWER :
B. P = I²R
9.
If a 100W bulb is used for 10 hours, how much energy is consumed?
A.
10 kWh
B.
1 kWh
C.
0.1 kWh
D.
100 kWh
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ANSWER :
B. 1 kWh
10.
Which unit is not a unit of power?
A.
Horsepower
B.
Watt
C.
Joule
D.
kW
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ANSWER :
C. Joule
11.
The power dissipated in a resistor is minimum when:
A.
Voltage is maximum
B.
Resistance is maximum
C.
Current is minimum
D.
Current is maximum
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ANSWER :
C. Current is minimum
12.
Which factor does not affect the power consumed in an electrical circuit?
A.
Resistance of the circuit
B.
Voltage applied
C.
Shape of the conductor
D.
Current flowing
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ANSWER :
C. Shape of the conductor