Question

The reason why the earth wire is used is:

• A. To direct any leaking charges into the earth.
• B. To provide safety to devices and their users.
• C. To reduce the complexity of the circuit.
• D. To provide extra current to the appliance.

Answer 1

Answer: (A), (B)

To provide safety to devices and their users.

When there is a leakage of charge, the Earth wire directs them to Earth to neutralize the net charge of the body. This is a safety measure, so that even when there is leakage of charge in an appliance, a user touching it won’t experience any current flowing through him, because the charges would flow through the Earth wire as it offers less resistance.