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Current Electricity

Current Electricity
Semiconductors have _______temperature co-efficient of resistance.

Zero
None of the listed here
Negative
Positive

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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
12.1 Ω
9 Ω
10 Ω

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Current Electricity
If an electric current is passed through a nerve, the man

Begins to laugh
Is excited
Becomes insensitive to pain
Begins to weep

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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
Electric current is a

Number only
Scalar quantity
Sometimes scalar and sometimes vector
Vector quantity

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Current Electricity
The resistance of a straight conductor is independent of

Shape of cross-section
Cross-sectional area
Material
Temperature

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