Question

If specific resistance of a potentiometer wire is
10-7 am and current flow through it is 0.1 A,
cross-sectional area of wire is 10-6 m2 then
potential gradient will be
(1) 10-2 volt/m (2) 104 volt/m
(3) 10-6 volt/m (4) 10-8 volt/m​

Answer 1

Answer:-

(a) 10-2 volt/m

Explanation:-

l= lenght

R= Resistance

V= voltage

by using formula V/l

=>IR/l

=>lpl/Al

=>0.1×10^−7/10^−6

=>0.01

=>10−2V/m

Answer 2

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