The tremendous electric charges in the atmosphere which produce sheet lightning in the clouds are produced by the process of:

An inflated rubber balloon is rubbed with a woollen cloth whereas a ballpoint pen refill is rubbed with a polythene bag. Which of these will get positively charged?

A) Inflated rubber balloon

B) Woollen cloth

C) Ballpoint pen refill

D) Polythene bag

Lightning can even burn up a tree. Lightning contains a tremendous amount of:

Explain why, a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by a charged balloon. (NCERT Book Question)

Explain why, a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing, if held by hand.