1. Fill in the blanks :
(a) A device that is used to break an electric circuit is called _______________.
(b) An electric cell has _______________ terminals.
Answer
(a) A device that is used to break an electric circuit is called electric switch.
(b) An electric cell has two terminals.
2. 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.
Answer
(a) True
(b) False
(c) False
3. Explain why the bulb would not glow in the arrangement shown in Fig. 12.13.
