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Current Electricity

Current Electricity
SI unit of power is

Watt
Coulomb
Watt-hour
Henry

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Current Electricity
Conductivity is the reciprocal of

Resistivity
Current density
None of the listed here
Resistance

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Current Electricity
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as

25 : 4
5 : 2
2 : 5
4 : 25

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Current Electricity
With rise in temperature the resistance of pure metals

First increases and then decreases
Remains constant
Increases
Decreases

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Current Electricity
A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be

10 Ω
11 Ω
9 Ω
12.1 Ω

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Current Electricity
Which of the following materials has the least resistivity ?

Mercury
Zinc
Copper
Lead

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MORE MCQ ON Current Electricity

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