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Which tube used to produce X-ray?

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A Fuse wire is characterised by

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When the main switch of the house is put off it disconnects the

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Electric power is measured in units of

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Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.

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What is the value of 1 kW = ?

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The electric current in a metal wire is due to the flow of -

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An electric fuse is based on

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Metals are good conductors of electricity because

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Find the current (in A) when a charge of 1200C flows in 6 seconds.

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The fuse in an electric circuit is connected in

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Working of safety fuses depends upon
1. magnetic effect of the current
2. chemical effect of the current
3. magnitude of the current
4. heating effect of the current
Select the correct answer using the code given below.

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During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to

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The unit of electrical power is

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Safety fuse wire used in domestic electrical appliances is made of metal of low

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The best conductor of electricity among the following is :

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Kilowatt-hour is the unit of :

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Copper wires are generally used for electrical power transmission instead of iron wire because :

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The earth-wire of a cable is connected to

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Lightning is caused due to

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