A resistance R is canected to a cell of EMF E and has an internal resistance r as shown in the figure. The voltage across R is measured using an ideal voltmeter and circuit current is measured by an ammeter. A rheostate of negligible resistance is used to vary the current in the circuit. ( ##ANE_RJB_PHY_XII_C03_E03_034_Q01.png" width="80%"> Write down the expression for current in the circuit and voltage across R at any instant.

A resistance R is canected to a cell of EMF E and has an internal resi

1.	A resistance R is canected to a cell of EMF E and has an internal resistance r as shown in the figure. The voltage across R is measured using an ideal voltmeter and circuit current is measured by an ammeter. A rheostate of negligible resistance is used to vary the current in the circuit. ( ##ANE_RJB_PHY_XII_C03_E03_034_Q01.png" width="80%"> Write down the expression for current in the circuit and voltage across R at any instant.
Answer» SOLUTION :`I = E/R + r^1 V= IR`

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