In a meter bridge (shown in the figure), the null point is found at a distance of 33.7 cm from A. If now a resistance of 12 is connected in parallel with S, the null point occurs at 51.9 cm. The values of R and S are respectively:
A resistance of draws current from a potentiometer. The potentiometer has a total resistance (as shown in the figure). A voltage V is supplied to the potentiometer. What is the voltage across R when the sliding contact is in the middle of the potentiometer?