Question

What happens to the brightness of a bulb if the broken filament of a bulb is rejoined and lighted?

Answer 1

Explanation:

Since lamps are connected in series, addition of more lamps increases resistance in the path and reduces current through each lamp.

This would be directly related to the increase of resistance in the series circuit

Answer 2

Answer:

What happens to the brightness of a bulb if the broken filament of a bulb is rejoined and lighted? ... If you put the bulb in a small lamp you will be able to twist it around properly to let the two broken ends bump into each other. The ends will spot weld themselves together and relight the bulb.