Question

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 1

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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..