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A 2 volt battery, a 15 Omega resistor an...

A 2 volt battery, a `15 Omega` resistor and a potentiometer of `100 cm` length, all are connected in series. If the resistance resistance of potentiometer wire is `5 Omega`, then the potential gradient of the potentiometer wire is

A

`0.005" V"//"cm"`

B

`0.05"V"//"cm"`

C

`0.02" V"//"cm"`

D

`0.2" V"//"cm"`

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