A potentiometer circuit shown in the figure is set up to measure emf of cell E. As the point P moves from X to Y, the galvanometer G shows deflection always in one direction, but the deflection decreases continuously until Y is reached. The balance point between X and Y may be obtained by

Question

A potentiometer circuit shown in the figure is set up to measure emf of cell E. As the point P moves from X to Y, the galvanometer G shows deflection always in one direction, but the deflection decreases continuously until Y is reached. The balance point between X and Y may be obtained by (A) decreasing the resistance R and decreasing V (B) decreasing the resistance R and increasing V (C) increasing the resistance R and increasing V (D) increasing the resistance R and decreasing V.

Tardigrade Admin · Accepted Answer

Decreasing R increases current in XY and there by increases the potential drop across XP and the balance point may be obtained. The current may be increased also by increasing V.

Q. A potentiometer circuit shown in the figure is set up to measure emf of cell E. As the point P moves from X to Y, the galvanometer G shows deflection always in one direction, but the deflection decreases continuously until Y is reached. The balance point between X and Y may be obtained by

decreasing the resistance R and decreasing V

decreasing the resistance R and increasing V

increasing the resistance R and increasing V

increasing the resistance R and decreasing V.

Decreasing R increases current in XY and there by increases the potential drop across XP and the balance point may be obtained. The current may be increased also by increasing V.

Decreasing $R$ increases current in $X Y$ and there by increases the potential drop across $XP$ and the balance point may be obtained. The current may be increased also by increasing $V$ .