Question

Figure 3.33 shows a potentiometer with a cell of 2.0 V and internal resistance 0.40Ω maintaining a potential drop across the resistor wire AB. A standard cell which maintains a constant emf of 1.02 V (for very moderate currents upto a few mA) gives a balance point at 67.3 cm length of the Wire. To ensure very low currents drawn from the standard cell, a very high resistance of 600 kΩ is put in series with it, which is shorted close to the balance point. The standard cell is then replaced by a cell of unknown emf 8 and the balance point found similarly, turns out to be at 82.3 cm length of the wire.Is the balance point affected by the internal resistance of the driver cell?

Answer 1

$\red{\boxed{No}}$

Because balance point will get affected by $\blue{\underline{ the \:change\: in\: testing\: cell}}$ not by change in Driver cell or standard cell.

$\mathfrak{hope\:it\:will\:Help\:You}$