Question

A metallic wire of lenght 20cm is stretched and its length is increased by 25%.Calcukate the per cent increase in tge resistance of the new wire

Answer 1

Explanation:

original length is 20 cm

increased length is 25 cm

so %incresed is 4000l/3A

Answer 2

Explanation:

the real length of wire is 20 cm

and stretched length is 25% of 20 cm is 4 then 20*4=80 cm

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