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Current Electricity

Current Electricity
The resistance of a straight conductor is independent of

Material
Cross-sectional area
Temperature
Shape of cross-section

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Current Electricity
Semiconductors have _______temperature co-efficient of resistance.

Negative
Zero
Positive
None of the listed here

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Current Electricity
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will

Remain constant
Increase
None of these
Decrease

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Current Electricity
If the number of valence electrons of an atoms is less than 4,the substance is usually

None of the listed here
An insulator
A semiconductor
A conductor

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Current Electricity
Conductivity is the reciprocal of

Resistivity
Resistance
Current density
None of the listed here

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Current Electricity
It becomes more difficult to remove

Third electron from the orbit
Second electron from the orbit
First electron from the orbit
Any electron from the orbit

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