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Current Electricity

Current Electricity
An instrument which detects electric current is known as

Galvanometer
Voltmeter
Rheostat
Wattmeter

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Current Electricity
Which of the following is the best conductor of electricity?

Zinc
Gold
Copper
Silver

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Current Electricity
The resistance of a straight conductor is independent of

Temperature
Cross-sectional area
Shape of cross-section
Material

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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

0.4%
0.3%
None of the listed here
0.2%

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Current Electricity
The resistance of conductor varies inversely as

Area of cross-section
Temperature
Length
Resistivity

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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

9 Ω
12.1 Ω
11 Ω
10 Ω

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