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Q.10. State the change in the ammeter reading observed when a resistance wire in a circuit is replaced by a wire of same matertial and same length but comparatively double cross - section area, keeping the source of potential difference the same.

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If the wire has same length and is of same material and double the crossection than the resistance becomes half.As we know I=V/R and V is same so current reading in ammeter will be double of the previous.

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