Which of the following statements explains lost volt in an electric circuit? The

Lost volt in an electric circuit refers to the voltage drop that occurs due to the presence of internal resistance in the circuit. When an electric current flows through a circuit, it encounters resistance, which causes the voltage to drop. This voltage drop is known as the lost volt. Option (d) correctly explains the lost volt in an electric circuit. The internal resistance of a cell or a battery causes a voltage drop as the current flows through it. The lost volt is the voltage drop that occurs across the internal resistance of the cell or battery. When a cell or battery is connected to an external circuit, the voltage across the external circuit is less than the total voltage of the cell or battery, due to the presence of the internal resistance. This is because some of the voltage is used up in driving the current through the internal resistance of the cell or battery. Therefore, the correct answer is "p.d across the internal resistance of the cell".