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Current Electricity

Current Electricity
All of the following are equivalent to watt except

Amperes/volt
Joules/sec.
Amperes × volts
(Amperes) ohm

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Current Electricity
The electrical energy required to heat a bucket of water to a certain temperature is 4 kWh. If the heat losses are 20 percent, the energy input is

3.2 kWh
2 kWh
6 kWh
5 kWh

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Current Electricity
A 3 Q resistor having 2 A current will dissipate the power of

4 watts
6 watts
2 watts
8 watts

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

Copper
Porcelain
Manganin
Carbon

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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
50 V
100 V
150 V

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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

Either Rl or Ri
None of them
Rl
Ri

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