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A potentiometer wire of 10 m length and ...

A potentiometer wire of 10 m length and having a resistance of 1ohm/m is connected to an accumlator of emf 2.2 volt and a high resistance box. To obtain a potential gradient of 2.2m V/m. the value of resistance used from the resistance box is:-

A

79 ohm

B

81ohm

C

90ohm

D

100ohm

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