Question

When a body is connected to earth, the electrons from the earth flows into the body. This means, the body is initially

• A. uncharged
• B. charged positively
• C. charged negatively
• D. an insulator

Answer 1

The correct option is B charged positively

$\text{Step 1: Concept of Earthing}$

Earth is a conductor, and acts as sink or source of charge i.e. it can provide any amount of charge as per need.

i.e. Whenever any charged body is earthed, due to Coulomb's attraction between charges of opposite polarity, it extracts the charge of opposite polarity from earth, so that it becomes neutral.

$\text{Step 2: Charge on given body}$

As the electrons(i.e. negative charge) flows from the earth into the body.

That means, the body must have been positively charged(opposite polarity) initially.

Hence correct answer is Option $B$

$\text{Note:}$ Also, we can understand the same thing in terms of Potential.

i.e. on earthing, the charge flows in such a manner, that potential of the body becomes same as that of earth.