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Current Electricity

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

50 V
200 V
150 V
100 V

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Current Electricity
The flow of current in solids is due to

Atoms
Electrons
Nucleus
Electrons and ions

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Current Electricity
For which of the following 'ampere second' could be the unit?

Energy
Charge
Reluctance
Power

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Current Electricity
A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is

0.3%
0.2%
0.4%
None of the listed here

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Current Electricity
Are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Varistors
Variable resistors
Semiconductors
Thermistor

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

Decreases
None of the listed here
Become zero
Increases

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MORE MCQ ON Current Electricity

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