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Current Electricity

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
0.2%
0.4%

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Current Electricity
The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?

64 Q
18 Q
36 Q
48 Q

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Current Electricity
Resistance of 220 V, 100 W lamp will be

4840 Q
4.84 Q
484 ft
48.4 Q

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Current Electricity
At 0 K, germanium behaves as

A ferromagnetic substance
A superconductor
A conductor
An insulator

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Current Electricity
In a lamp load when more than one lamp are switched on the total resistance of the load

Decreases
None of these
Increases
Remains same

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Current Electricity
The current in the circuit having constant resistance is tripled. The power increases

3 times
1/9 times
9 times
1/3 times

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MORE MCQ ON Current Electricity

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