Physics 2018 JAMB Past Questions - Question 29: Electrical appliances in homes are normally earthed so that

Correct Answer

A

Explanation

F = QVB
Electrical appliances in homes are normally earthed to ensure safety and protect against electrical hazards. Earthing, also known as grounding, involves connecting the metal parts of an appliance or electrical system to the Earth's conductive surface, typically through a grounding wire or rod.

The primary purpose of earthing is to prevent electric shocks. If a fault occurs in an appliance or electrical system, such as a short circuit or insulation failure, the excess electrical current can flow through the grounding path instead of passing through a person or causing damage to the appliance. By providing a low-resistance path to the Earth, earthing helps to dissipate the electrical energy and prevent harm.

Earthing also helps to stabilize voltage levels and protect against power surges. It can provide a reference point for electrical systems, ensuring that voltages are within safe limits and reducing the risk of damage to sensitive electronic devices.

Overall, earthing is an essential safety measure in homes and other buildings to protect people and property from electrical hazards and ensure the proper functioning of electrical systems.