Q23 of 23 Page 77

A torch is not functioning, though contact points in the torch are in working condition. What can be the possible reasons for this? Mention any three.

Some of the possible reasons are:


● The cells may have been used up.


● Cells might not have been arranged in correct order.


● The bulb may have been fused.


● The switch might be faulty.


(Write any three).


More from this chapter

All 23 →
19

Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminum foil. Will she succeed? Explain, how?

 20

Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.

 21

Fig. 12.10 A and B, show a bulb connected to a cell in two different ways.


(i) What will be the direction of the current through the bulb in both the cases. (Q to P or P to Q)


(ii) Will the bulb glow in both the cases?


(iii) Does the brightness of the glowing bulb depend on the direction of current through it?

 22

Think of six activities which use electric current. Also name the devices used to perform the activity.