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Current Electricity

Current Electricity
The resistance of a straight conductor is independent of

Cross-sectional area
Material
Shape of cross-section
Temperature

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Current Electricity
At 0 K, germanium behaves as

An insulator
A superconductor
A conductor
A ferromagnetic substance

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Current Electricity
Resistance of 220 V, 100 W lamp will be

4.84 Q
484 ft
4840 Q
48.4 Q

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

A conductor
A semiconductor
None of the listed here
An insulator

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Current Electricity
Resistance of a material always decreases if

Temperature of material is increased
Number of free electrons available becomes more
None of these
Temperature of material is decreased

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Current Electricity
When one lag of parallel circuit is opened out the total current will

None of the listed here
Increases
Become zero
Decreases

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