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CURRENT ELECTRICITY

Current Electricity
At 0 K, germanium behaves as

A ferromagnetic substance
An insulator
A superconductor
A conductor

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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%
0.2%
None of the listed here

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

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

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Current Electricity
Semiconductors have _______temperature co-efficient of resistance.

Positive
Negative
Zero
None of the listed here

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Current Electricity
Conductivity is the reciprocal of

Resistivity
Resistance
None of the listed here
Current density

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