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| 1. |
(a) State the working principle of a potentiometer with the help of a circuit diagram.(b) Explain how the internal resistance of a cell is determined. (c ) How do the following affect the potentiometer circuit when(i) the internal resistance of the driver cell increases, (ii) the series resistor connected to the driver cell is reduced ? Justify your answer. |
| Answer» SOLUTION :( C) (i) If internal resistance of the driver cell increases then current I flowing through potentiometer wire and HENCE potential gradient decreases. (ii) If series resistor CONNECTED to the driver cell is reduced, the current I flowing through potentiometer wire as well as potential gradient across the potentiometer wire increase. | |