A potentiometer wire of length 100 cm has a resistance of 10 ohm.It is connected in a series with a resistance and accumulator of EMF 2V and negligible internal resistance .A source of EMF 10 mV is balanced against a length of 40 cm of the potentiometer wire.What is the value of the external resistsnce?

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Q. A potentiometer wire of length

100 c m

has a resistance of

10

ohm. It is connected in series with a resistance and an accumulator of emf

2 V

and of negligible internal resistance. A source of emf of

10 m V

is balanced against a length of

40 c m

of the potentiometer wire. What is the value of external resistance?

Q. A potentiometer wire of length

100 cm

has a resistance of

10 Ω

. It is connected in series with a resistance and a cell of emf

2 V

and of negligible internal resistance. A source of emf

10 mV

is balanced against a length of

40 cm

of the potentiometer wire. What is the value of external resistance?

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