A resistor R is connected to a cell of emf e and internal resistance r. Potential difference across the resistor R is found to be V. State the relation between e, V, R and r.

A capacitor is conneted to a cell emf E having some internal resistance r . The potential difference across the

A cell of e.m.f E and internal resitance r ,is connected to an external resistance R. the variation of potential difference V across the resistance R as function of R as shown in the figure, is the best represented by curve

If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as

A resistance R is connected across a cell of emf epsilon and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell is V. Write the expression for r in terms of epsilon , V and R .

Two cells of emf E each and internal resistance r_(1) and r_(2) are connected in series across a load resistance R. If potential difference across the first cell is zero, then find the relation between R, r_(1) and r_(2)

Two cells of emf E each and internal resistance r_(1) and r_(2) are connected in series across a load resistance R. If potential difference across the first cell is zero, then find the relation between R, r_(1) and r_(2)

The figure shows a network in which the cell is deal and it has an emf E. The potential difference across the resistance 2R is

(a) A voltmeter with resistance R_v is connected across the terminals of a battery of emf E and internal resistance r . Find the potential difference measured by the voltmeter. (b) If E = 7.50 V and r = 0.45 Omega , find the minimum value of the voltmeter resistance R_v so that the voltmeter reading is within 1.0% of the emf of the battery. (c) Explain why your answer in part (b) represents a minimum value.

Two cells of the same e.mf. e but different internal resistances r_(1) and r_(2) are connected in series with an external resistance 'R'. The potential drop across the first cell is found to be zero. The external resistance Ris

A resistor R is conneted to a parallel combination of two identical batteries each with emf E and an internal resistance r. The potential drop across the resistance R is.