Explain the meaning of the terms e.m.f., terminal voltage, and internal resistance of a cell.

For a cell, the graph between the potential difference (V) across the terminals of the cells and the current I drawn from the cell is as shown in figure. Calculate the e.m.f. and the internal resistance of the cell.

A dry cell delivering 2 A h a termin al voltage is 1.41V. What is the internal resistance of the cell if its open- circuit voltage is 1.59V?

In the adjoining circuit, the e.m.f. of the cell is 2 volt and the internal resistance is negligible. The resistance of the voltmeter is 80 ohm . The reading of the voltmeter will be

Two identical cells of emf 1.5 V each joined in paralllel provide supply to an external circuit consisting of two resistances of 7 Omega each joined in parallel. A very high resistance voltmeter reads the terminal voltage of cells to be 1.4 V. Calculate the internal resistance of each cell.

In the figure the potentiometer wire AB of length L and resistance 9 r is joined to the cell D of e.m.f epsilon and internal resistance r. The emf of cell C is epsilon/2 and its internal resistance is 2r.The galvanometer G will show on deflection when the length AJ is

For a cell of e.m.f. 2 V , a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a 2Omega resistor and the balance is obtained across 40 cm of the wire, then the internal resistance of the cell is

Four identical cells each of emf 2V, are joined in parallel providing supply of current to external circuit consisting of two 15 Omega resistors joined in parallel. The terminal voltage of the cells ae read by an ideal voltmeter is 1.6V. Calculate the internal resistance of each cell.

The figure shows a plot of terminal voltage 'V' verus the current 'I' of a given cell. Calculate from the graph (a) emf of the cell and (b) internal resistance of the cell.

A cell of emf E is connected across a resistance R. The potential difference between the terminals of the cell is found to be V. The internal resistance of the cell must be -

The e.m.f. of a primary cell is 2V, when it is shorted then it gives a current of 4A. Calculate internal resistance of primary cell.