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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The circuit shows in Fig .shows the use of potentiometer to measure the internal resistance of a cell. (a) When the key is open, how does the balance point change, if the driver cell decreases ? (b) When the key is closed, how does the balance point change, if R is increased, keeping the current from the driver cell constant ?

The circuit shows in Fig .shows the use of potentiometer to measure the internal resistance of a cell. (a) When the key is open, how does the balance point change, if the driver cell decreases ? (b) When the key is closed, how does the balance point change, if R is increased, keeping the current from the driver cell constant ?

how does the balance point change if R is increased if the driver cell decreases ? (b) When the key is closed keeping the current from the driver cell constant ? The circuit shows in Fig .shows the use of potentiometer to measure the internal resistance of a cell. (a) When the key is open