A dry cell of internal resistance 0.1 ohm drives current of 20 A when the cell is not short circuited. Find the emf of the cell. Find the terminal p.d. when the cell is open circuited.

In an open circuit the emf of the cell is

The cell drives current through a circuit when the circuit is closed. In a closed circuit the emf of the cell is

A cell of terminal p.d. of 10 volts drives a current of 2 Amperes calculate the emf of the cell if its internal resistance is 0.5 ohm.

A cell of emf E and internal resistance r drives a current of 5 Ampere through an extenal resistance of 8 ohm. The current drops to 4 Ampere when the external resistance is increased to 10.1 ohm. Find the emf E and the internal resistance r of the cell.

What is the short circuit of a cell?