Fill in the blanks:

a. A device that is used to break an electric circuit is called ___.

b. An electric cell has _____ terminals.

Mark ‘True’ or ‘False’ for following statements:

a. Electric current can flow through metals.

b. Instead of metal wires, a jute string can be used to make a circuit.

c. Electric current can pass through a sheet of thermocol.

Explain why the bulb would not glow in the arrangement shown in the figure.

Complete the drawing shown in the figure to indicate where the free ends of the two wires should be joined to make the bulb glow.

What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.