Q5 of 330 Page 26

Which among iron and mercury is a better conductor of electricity?

Mercury is a better conductor than iron as it has lower resistivity than iron.


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3

On what factors does the resistance of a conductor depend?

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Name the material which is the best conductor of electricity.

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Why are copper and aluminium wires usually used for electricity transmission?

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Name the material which is used for making the heating element of an electric iron.