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Current Electricity

Current Electricity
Resistance of a tungsten lamp _____ as applied voltage increases.

Increases
Decreases
None of the listed here
Remains same

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Current Electricity
SI unit of power is

Watt
Watt-hour
Coulomb
Henry

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

Zinc
Lead
Copper
Mercury

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Current Electricity
One Newton meter is same as

Five joules
One joule
One joule second
One watt

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Current Electricity
A rheostat differs from potentiometer in the respect that it

Has higher wattage rating
Offers large number of tapping
Has lower wattage rating
Has large number of turns

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Current Electricity
All good conductors have high

Thermal conductivity
Resistance
Conductance
Reluctance

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