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Current Electricity

Current Electricity
Resistance of a carbon filament lamp _______ as the applied voltage increases.

Remains same
Increases
Decreases
None of the listed here

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Current Electricity
The insulation on a current carrying conductor is provided

Both of the listed here
To prevent leakage of current
To prevent shock
None of above factors

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Current Electricity
Which method can be used for absolute measurement of resistances?

Lorentz method
Wheastone bridge method
Releigh method
Ohm's law method

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Current Electricity
A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be

11 Ω
9 Ω
10 Ω
12.1 Ω

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Current Electricity
Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be

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

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

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

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