A 50 volt battery is connected across a 10 ohm resistor. If the current is 4.5 A, calculate the internal resistance of the battery.

The p.d. between the two terminals of a cell in open circuit is 2 volt. The p.d. falls to 1.5 volts when the cell is connected across a 2 ohm resistance. Find the internal resistance of the cell.

The current through a galvanometer reduces to 25% of its orginal value when a shunt is connected. The resistance of the shunt is 25 ohm. Find the resistance of the galvanometer.

A cell of emf E and internal resistance ® is connected across an external resistance, R. The cell shall drive maximum current through the external resistance R only if

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.