Question

If a bulb is lit after rejoining the part of a broken filament.What change will occur in the intensity of the light from the lamp?,what will be the change in the power of the lamp?give reason

Answer 1

The resistance will be lesser than before, therefore more current can flow through it, and bulb will emit more glow and temperature will also be more higher than before. Whatsoever,bulb will fail. resistance decreases current increases and so brightness ofbulb increases........