A cell of internal resistance 1.5 Ω and of emf 1.5 volt balances 500 cm on a potentiometer wire. If a wire of 15 Ω is connected between the balance point and the cell, then the balance point will shift
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a
to zero
b
by 500 cm
c
by 750 cm
d
none of the above
answer is D.
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Detailed Solution
Balance point has some fixed position on potentiometer wire. It is not affected by the addition of resistance between balance point and cell.
A cell of internal resistance 1.5 Ω and of emf 1.5 volt balances 500 cm on a potentiometer wire. If a wire of 15 Ω is connected between the balance point and the cell, then the balance point will shift