when a P.D. of 2 volt is applied across the ends of a wire 5 m length. A current of 1amp is found to flow through it. calculate 1- res. per unit length of wire 2-res of 2 m length of wire 3-res across the ends of the wire if it is doubled on itself.

Asked by PALLAVI GARG | 23rd Jun, 2013, 12:26: AM

Expert Answer:

Using ohms law 
V = IR
R = V/I 
R = 2/1 = 2 ohms
a. Hence, resistance/length = 2/5 = 0.4 ohms/m

Answered by  | 23rd Jun, 2013, 05:26: AM

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