1.

the resistance of a wire is 20 ohm find the resistance of the wire when it is streched so that it's length increase by 8%

Answer»

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Hey mate!


Initial length of WIRE = L


8% of L = 2L/25


New length=(L+2L/25)


=27L/25


.

• •. n =27/25


R' =(n^2)R


R' = (27/25)^2R


R' = 729/625R


#phoenix..







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