Question

OT (vii) The emf of the cell balances against a length of 217 cm of potentiometer wire. When the cell is shunted by a resistan of 151, the balancing length is 200 cm. Find the inter B) resistance of the cell.​

Answer 1

Answer:

The internal resistance of cell is given by :-

r=(

12

4

−1)R (l

1

: balance length without shunt

l

2

: balance length with shunt

R: connoted shunt in series with cell)

⇒r=(

100

150

−1)×2

=(1.5−1)×2=1Ω (Ans)