Figure 3 below shows a potentiometer circuit in which the driver cell D has an emf of and internal…
Physics20243 marksNumerical
Figure 3 below shows a potentiometer circuit in which the driver cell D has an emf of $6\text{ V}$ and internal resistance of $2\,\Omega$. The potentiometer wire AB is $10\text{ m}$ long and has a resistance of $28\,\Omega$. The series resistance $R_s$ is of $20\,\Omega$.
Calculate:
Figure 3
(a)
The current $I_p$ flowing in the potentiometer wire AB when the jockey (J) does not touch the wire AB.
(b)
Emf of the cell X if the balancing length AC is $4.5\text{ m}$.
