A copper wire of radius r and length l has a resistance of R. A second – McqOptions

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1.	A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken, and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
A.	5R
B.	5 / 4R
C.	4 / 5R
D.	R / 5
Answer» E.

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