Why is an electric fuse required in all electrical appliances?

Paheli does not have a night lamp in her room. She covered the bulb of her room with a towel in the night to get dim light. Has she taken the right step? Give one reason to justify your answer.

Why are compact fluorescent lamps (CFLs) preferred over electric bulbs?

Can we use the same fuse in a geyser and a television set? Explain.

Name two electric devices for each were (i) heating effect of the current is used and (ii) the magnetic effect of current is used.