1.

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10?7 ohm?meter and the current passing through it is 0.1 ampere; cross-section of the wire is 10?6 m2.  The potential gradient along the potentiometer wire is             [KCET 2003]

A.         \[{{10}^{-4}}\] V/m
B.         \[{{10}^{-6}}\] V/m
C.         \[{{10}^{-2}}\] V/m    
D.         \[{{10}^{-8}}\] V/m
Answer» D.         \[{{10}^{-8}}\] V/m


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