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CURRENT ELECTRICITY

Current Electricity
At 0 K, germanium behaves as

A conductor
A ferromagnetic substance
A superconductor
An insulator

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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%
0.2%
None of the listed here
0.4%

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Current Electricity
Constantan wire is used for making starndard resistance because it has

Low specific resistance
High specific resistance
High melting point
Negligibly small temperature co-efficient of resistance

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Current Electricity
Semiconductors have _______temperature co-efficient of resistance.

Positive
None of the listed here
Negative
Zero

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Current Electricity
Conductivity is the reciprocal of

None of the listed here
Resistivity
Current density
Resistance

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