Simple Electric Circuit NDA Questions

NDA Physics

Simple Electric Circuit MCQ Questions


1.
Substances that have constant resistance over a wide range of voltages are
A.
Ohmic
B.
Non-ohmic
C.
Resistive
D.
Non-resistive
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ANSWER :
A. Ohmic
2.
A resistor having resistance 6.2Ω is connected across a battery of 5 V. The current passing through the resistor is
A.
0.4 A
B.
0.8 A
C.
1.2 A
D.
1.3 A
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ANSWER :
A. 0.4 A
3.
As compared to short wires, long wires have
A.
Same resistance
B.
No resistance
C.
Less resistance
D.
More resistance
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ANSWER :
D. More resistance
4.
The device that disconnects the supply automatically if current exceeds the normal value is
A.
Fuse
B.
Circuit breaker
C.
Cable
D.
Capacitor
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ANSWER :
B. Circuit breaker
5.
As per Ohm's law, V (potential difference) is equal to
A.
R (resistance) / I (current)
B.
I (current) / R (resistance)
C.
I (current) × R (resistance)
D.
I (current) + R (resistance)
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ANSWER :
C. I (current) × R (resistance)
6.
The resistance of a conductor varies inversely as
A.
Length
B.
Area of cross-section
C.
Temperature
D.
Resistivity
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ANSWER :
B. Area of cross-section