Question

100 bulbs are connected in parallel connection, and there is one switch connected to pass the electric current. on passing the electric current, will all the bulbs glow together on at certain time interval??

Answer 1

They all will glow together after the switch is turned on, because the speed of distribution of the electric field which creates current in the conductors is equal to the velocity of light (3•108 m/s). Human’s eye can’t detect such fast change; human will see that all the bulbs started to glow at the same moment.