If you increase the length of copper wire,what happens to the deflection in a compass ?
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On changing the direction of flow of current, the direction of deflection of compass needle is reversed. For a given current, if we move the compass needle away from the wire, its deflection decreases.
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(a) On changing the direction of flow of current, the direction of deflection of compass needle is reversed. (b) For a given current, if we move the compass needle away from the wire, its deflection decreases.
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