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Current Electricity

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

Energy
Reluctance
Charge
Power

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

Mercury
Lead
Zinc
Copper

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Current Electricity
Electric current is a

Number only
Vector quantity
Sometimes scalar and sometimes vector
Scalar quantity

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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
A closed switch has a resistance of

About 500 ohms
About 50 ohms
Infinity
Zero

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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

None of the listed here
0.2%
0.4%
0.3%

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