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Current Electricity

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
5 kWh
0.05 kWh
0.005 kWh

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Current Electricity
Specific resistance of a substance is measured in

Ω-m
Ω/m
None of the listed here
m/Ω

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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
Conductance is reciprocal of

Resistance
Reluctance
Capacitance
Inductance

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

Copper
Mercury
Zinc
Lead

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Current Electricity
Ohm's law is not applicable to

Semi-conductors
High currents
Dc circuits
Small resistors

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