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Current Electricity

Current Electricity
A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is

0.4%
0.3%
0.2%
None of the listed here

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Current Electricity
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open

There will be heavy current in the main line
Rest of the two bulbs will not light
All three bulbs will light
The other two bulbs will light

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Current Electricity
In a lamp load when more than one lamp are switched on the total resistance of the load

Increases
Remains same
Decreases
None of these

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Current Electricity
Ampere-hour is the unit of

Strength of current
Energy
Power
Quantity of electricity

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Current Electricity
With rise in temperature the resistance of pure metals

First increases and then decreases
Decreases
Increases
Remains constant

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Current Electricity
Voltage dependent resistors are used

For inductive circuits
To suppress surges
As heating elements
As current stabilizers

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