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Current Electricity

Current Electricity
The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?

18 Q
48 Q
36 Q
64 Q

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Current Electricity
Which of the following material has nearly zero temperature co-efficient of resistance?

Copper
Carbon
Manganin
Porcelain

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Current Electricity
A thermistor has

Negative temperature coefficient
Positive temperature coefficient
Zero temperature coefficient
Variable temperature coefficient

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Current Electricity
E. M. F. In a circuit

Increases circuit resistance
None of the listed here
Decrease circuit resistance
Maintains potential difference

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Current Electricity
With rise in temperature the resistance of pure metals

Remains constant
First increases and then decreases
Increases
Decreases

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Current Electricity
The SI unit of power is

Coulomb
Henry
Watt-hour
Watt

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