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The resistance per unit length of a wire...

The resistance per unit length of a wire is `1Omega//"m"`. A Leclanche cell of e.m.f. 1.45 V is balanced against 2.9 m length of potentiometer wire. The current through the wire is

A

`1" A"`

B

`2" A"`

C

`0.5" A"`

D

`0.1" A"`

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