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Current Electricity

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

Carbon
Manganin
Copper
Porcelain

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Current Electricity
The current in the circuit having constant resistance is tripled. The power increases

1/9 times
3 times
9 times
1/3 times

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Current Electricity
Electric pressure is also called

Power
Energy
Resistance
Voltage

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Current Electricity
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open

There will be heavy current in the main line
All three bulbs will light
The other two bulbs will light
Rest of the two bulbs will not light

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Current Electricity
An electric filament bulb can be worked from

All of the listed here
Battery supply only
AC supply only
DC supply only

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Current Electricity
What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω?

200 V
150 V
100 V
50 V

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