Question

A copper wire having resistance r is cut into 4 equal oarts 1) find the resistance of the combination of these 4 parts are connected in parallel

Answer 1

Howdy!!

your answer is ----

Since, A copper wire having resistance r is cut into 4 equal parts .

so, resistance of each wire is r/4.

now, these 4 wire connected in parallel

so, equivalent resistance r' is

1/r' = 1/r/4 + 1/r/4 + 1/r/4 + 1/r/4

=> 1/r' = 4/r + 4/r + 4/r + 4/r

=> 1/r' = 16/r

=> r' = r/16

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