A battery of emf 2 volts and internal resistance 0.1 ohm is being charged with a current of 5 amps. What is the potential difference between the two terminal of the battery?

A cell of emf 2 V and internal resistance 0.1Omega is connected to 3.9Omega external resistance. What will be the potential difference across the terminals of the cell?

Find the current drawn by the battery and the potential difference between A and B.

A storage battery of emf 8.0 V and internal resistance 0.5 Omega is being charged by a 120 V dc supply using a series resistor of 15.5 Omega . What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?

A cell of emf 2 V and internal resistance 0.1Ohm is connected to a 20 Ohm resistor .What is the current in the circuit ?

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 as V. Write the expression for 'r' in terms of epsilon , V and R.