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Current Electricity

Current Electricity
Ohm's law is not applicable to

Dc circuits
High currents
Semi-conductors
Small resistors

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Current Electricity
The filament of electrical bulb is made of

Steel
Nickel
Aluminium
Tungsten

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Current Electricity
The thickness of insulation provided on the conductor depends on

The magnitude of voltage on the conductor
Both magnitude of voltage and current
The magnitude of current flowing through it
None of the listed here

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Current Electricity
The resistance of a straight conductor is independent of

Shape of cross-section
Cross-sectional area
Temperature
Material

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Current Electricity
It becomes more difficult to remove

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

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

4.84 Q
4840 Q
484 ft
48.4 Q

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