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Current Electricity

Current Electricity
A closed switch has a resistance of

Infinity
About 500 ohms
About 50 ohms
Zero

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Current Electricity
The resistance of a straight conductor is independent of

Cross-sectional area
Temperature
Material
Shape of cross-section

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Current Electricity
All of the following are equivalent to watt except

(Amperes) ohm
Amperes × volts
Amperes/volt
Joules/sec.

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Current Electricity
SI unit of power is

Coulomb
Watt-hour
Watt
Henry

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Current Electricity
A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is

0.3%
None of the listed here
0.4%
0.2%

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Current Electricity
In which of the following substances the resistance decreases with increase in temperature?

Carbon
Constantan
Silver
Copper

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MORE MCQ ON Current Electricity

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