Q6 of 25 Page 13

Why it necessary to connect an earth wire to electric appliances having metallic bodies? ( CBSE 2012)


An electric appliance having metallic body can have current leak and current may flow through its body. It can be fatal if a person touches its current carrying metallic body. So, it must be connected to an earth wire to pass the extra current, flowing through its body, to the earth plate.

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Suppose a coil is place in a changing magnetic field and the circuit is not closed will the current induce in the coil? ( CBSE 2011)

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 7 A compass needle is placed near a current carrying wire. State your observation for the following cases, and give reasons for the same in each case.
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(b) The compass needle is displaced away from the wire. ( CBSE 2009) 8

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