Explain why a charged balloon is repelled by another charged balloon, whereas an uncharged balloon is attracted by another charged balloon.

Describe with the help of a diagram an instrument which can be used to detect a charged body.

Suppose you are outside your home and an earthquake strikes. What precautions would you take to protect yourself?

The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.