Question

Pls Help :
Harry made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb
holder) and copper connecting wires. When he ‘turned on ‘the switch, the torch bulb did not glow at all. He checked the circuit and found that all connections were right.
a. What could be the possible reason for the torch bulb not glowing even when the circuit was complete?
b. What could have caused the above condition to happen?

Answer 1

Answer:

1. the bulb might be fused or the current supply by the cell is insufficient

2.the bulb should be changed

Answer 2

Answer:

One of the reasons may be that the rubber band used in the cell holder may not be tight enough to keep the two cells in contact with each other. If the cells are not in proper contact with each other, then the circuit will not be complete and current will not flow through the circuit. Hence, the bulb will not glow.

The other reason may be that the two cells are not connected properly. The negative terminal of one cell must be connected to the positive terminal of the other cell.