Question

a wire has resistance R it is broken into two equal parts and these two parts are joined in parallel the effective resistance is (a )r / 2 (b) r/4 ( c) 2r (d)4r​

Answer 1

Answer:

see R=rho (l)/A

so

we have that l is gone to l/2

and so each part has R/2 resistance

and joined in parallel we get R1R2÷R1+R2

SO R/4 IS CORRECT B

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