Paheli connected two bulbs to a cell as shown in Fig. 12.8.

She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.

The bulb A will not glow.

As we know, if a circuit is not complete the bulb will not glow. The filament is the glowing part of the bulb as well as it is the connecting part. It completes the circuit within the bulb.

If the filament of the bulb B is broken the circuit is not complete and hence bulb A will not glow. If any of the component is broken which completes the circuit the circuit will not work. The most important condition is to first complete the circuit.

If any other bulb is also connected it will also not work. Because there is no complete way for a current.