Usually, a bulb takes very long time to light up after switching it 'on'.
The speed of current in conductors is very high. So, the bulb lights up almost instantaneously as the swithch is 'on'.
When we imagine light as a ray, when a bulb is switched on light ray leaves it. However as we switch off it, there is no light ray is in the room. So does it mean that the bulb takes in all the light?
Current in a wire is due to the flow of electrons in the wire although the drift speed of the electron is very small yet an electric bulb lights up soon as it is switched on explain why