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When the electric current through a fuse exceeds a certain limit, the fuse wire melts and breaks.

The switch is used to open or close the circuit.

Arun buys four bulbs of $15 \mathrm{W}, 40 \mathrm{W}, 60 \mathrm{W}$and $100 \mathrm{W}$ respectively. Which one should he use in his bedroom as a night bulb?

Device used to open and close a circuit is 

Which one of the following is used as a light source?

Safety device used in an electric circuit is

Draw the symbols for the electric components in the table:

Draw the circuit diagram for the following series connection.