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Current Electricity

Current Electricity
No current flow between two charged bodies if they have same

Potential
Charge
None of the listed here
Capacity

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Current Electricity
An electrical lamp coonsumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is

5 kWh
0.005 kWh
5 kWh
0.05 kWh

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Current Electricity
Two lamps 100 W and 40 W are connected in series across 230 V. Which of the following statement is correct?

40 W lamp will glow brighter
100 W lamp will glow brighter
40 W lamp will fuse
Both lamps will glow equally bright

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Current Electricity
One commercial unit of energy equals

Ten kilowatt-hour
One watt-hour
One kilowatt-hour
One watt-hour

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Current Electricity
Nichrome wire is an alloy of

Chromium and vanadium
Copper and silver
Lead and zinc
Nickel and chromium

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Current Electricity
The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around

1.6 x 10-8 ω-m
1.4 x 10-8 ω-m
1.8 x 10-8 ω-m
1.2 x 10-8 ω-m

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