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Current Electricity

Current Electricity
Resistance of a tungsten lamp _____ as applied voltage increases.

Remains same
None of the listed here
Decreases
Increases

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Current Electricity
Insulators have _______ temperature co-efficient of resistance.

None of the listed here
Positive
Negative
Zero

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Current Electricity
Varistors are

Insulators
Non-linear resistors
Resistor with zero temperature co-efficient
Carbon resistors

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

Become zero
Decreases
Increases
None of the listed here

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Current Electricity
Two resistances Rl and Ri are connected in series across the voltage source where Rl > Ri. The largest drop will be across

Ri
None of them
Either Rl or Ri
Rl

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Current Electricity
International ohm is defined in terms of the resistance of

A column of mercury
A cube of copper
A cube of carbon
The unit length of wire

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