Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.

Fill in the blanks:

a. Longer line in the symbol for a cell represents its ________terminal.

b. The combination of two or more cells is called a ______.

c. When current is switched ‘on’ in a room heater, it ___________.

d. The safety device based on the heating effect of electric current is called a _________.

Mark “T” if the statement is true and “F” if it is false:

a. To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T/F)

b. When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T/F)

c. An electromagnet does not attract a piece of iron. (T/F)

d. An electric bell has an electro-magnet. (T/F)

An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.

Zubeda made an electric circuit using a cell holder shown in Fig. 14.4, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.