Final answer:
Electrical energy converts to light, heat, mechanical, and other forms of energy when it reaches a house. High-voltage transmission lines and transformers ensure efficient power delivery and safety for household use.
Step-by-step explanation:
When electrical energy reaches a house through electrical wires, it converts into various forms of energy depending on the appliance or device using the electricity. For example, a light bulb converts electrical energy into light and thermal energy, an electric heater converts it primarily into thermal energy, and a motor converts it into mechanical energy. The transformation of electrical energy into other forms is due to the work done by the electric current flowing through the conductors in the circuits of these appliances.
Electrical power is transmitted from power plants to homes using high-voltage transmission lines for greater efficiency over long distances. This high voltage is stepped down by transformers before it enters our homes to make it safe to use with our appliances. Transmitting electricity at high voltages reduces resistive heating losses, which makes the overall system of transmitting electrical power more efficient.