When a battery is being charged, its terminal potential difference is

Explanation

Electromotive force (emf): This is the maximum potential difference that a battery can provide when no current is flowing through it. It represents the voltage generated by the chemical reactions inside the battery.- Terminal potential difference (V): This is the voltage measured across the terminals of the battery while it is connected to a load or when current is being drawn from it. It accounts for the voltage drop across the internal resistance of the battery due to the flow of current.When a battery is being charged, an external voltage source (such as a charger) applies a potential difference across the battery terminals in the opposite direction to its emf. As a result, the terminal potential difference becomes greater than the emf during charging. This allows the battery to accept the charging current and store energy in the form of chemical potential energy.