What is the current required to light a 60 W incandescent bulb in a domestic supply of 240 V ?

To determine the current required to light a 60 W incandescent bulb on a domestic supply of 240 V, the fundamental electrical power formula is used: Power (P) = Voltage (V) × Current (I). Rearranging this formula to solve for current gives I = P / V. By substituting the given values, where P = 60 W and V = 240 V, the calculation becomes I = 60 / 240. This results in a current of 0.25 Amperes (A). This relationship between power, voltage, and current is a standard principle in electrical physics used to calculate the load of domestic appliances. Therefore, a 60 W bulb connected to a 240 V mains supply draws exactly 0.25 A of current to operate at its rated power.