HARD
8th CBSE
IMPORTANT
Earn 100

Draw a labelled diagram of a gold-leaf electroscope. Describe how you will use it to detect a charge, measure a charge and find the nature of the charge.

Important Questions on Some Natural Phenomena

EASY
8th CBSE
IMPORTANT
Explain how lightning occurs between two clouds during a storm.
EASY
8th CBSE
IMPORTANT
Explain the process of lightning striking a building or tree.
EASY
8th CBSE
IMPORTANT
In what ways is lightning useful?
MEDIUM
8th CBSE
IMPORTANT
Explain how an earthquake happens.
EASY
8th CBSE
IMPORTANT
List three things that you will do during an earthquake. 
MEDIUM
8th CBSE
IMPORTANT
Why are taller buildings in greater danger of being struck by lightning?
HARD
8th CBSE
IMPORTANT
When a positively charged body is brought near an uncharged metal rod, the part of the rod near the charged body acquires a negative charge, and the far side a positive charge. Can you say why this happens? Remember that in a body, negative charges are mobile whereas positive charges are fixed.
MEDIUM
8th CBSE
IMPORTANT
If you hold a plastic comb in your hand and rub it in your hair, it will be charged. However, if you do the same with a metal comb it will not get charged. Why? But if the metal comb has a plastic handle and how you hold it from the handle, it will also get charged. Why?