In a domestic circuit, electrical appliances and lamps are arranged in parallel across the mains so as to enable the

Answer Details

Electrical appliances and lamps are arranged in parallel across the mains so as to enable the voltage across the appliances not to be affected when the lamps are switched on and off. When devices are connected in parallel, they receive the same voltage as each other. This is because each device is connected to the same two points in the circuit, and the voltage difference between those points is the same for each device. In contrast, if the devices were connected in series, the voltage would be divided between them, and the devices would not receive the same voltage. Therefore, in a domestic circuit, electrical appliances and lamps are arranged in parallel across the mains to ensure that the voltage across each device remains constant regardless of whether other devices in the circuit are switched on or off.