A potentiometer has uniform potential gradient. The specific resistanc – McqOptions

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1.	A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^-9 m and the current passing through it is 0.5A and the cross sectional area of the wire is 10^-8m². Calculate the potential gradient along the potentiometer wire.
A.	0.5 10<sup>-9</sup> V/m
B.	0.5 10<sup>-8</sup> V/m
C.	0.5 10<sup>-1</sup> V/m
D.	0.5 10<sup>-15</sup> V/m
Answer» D. 0.5 10<sup>-15</sup> V/m

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