Physics, asked by KarthuKarthika, 1 year ago

Even though the drift velocity of electrons is very small [1mm/s] an electric bulb lights up as soon as switch is on. Why?

Answers

Answered by mafty
4
The speed that a signal travels down the wire really has nothing to do with the drift speed of the electrons.
The actual speed of electrons in a metal is quite large, however they go in every direction so the current is zero in the absence of an applied field. 

KarthuKarthika: Thanks a lot
mafty: plz mark as brainliest if it helped you
KarthuKarthika: But my question was, y an electric bulb lights up as soon as switch is on. Ur answer does only says about drift velocity
Answered by Kimmus
5
I'm not so sure...
Electrons are present at every point in an electric circuit. When a potential difference is applied, electric field appears through out the circuit with speed of light. So i think this is the reason why current flows instantly.

Kimmus: Hope it helped ^_^
KarthuKarthika: Yes. You are correct
Kimmus: Oh!! Thanks a lot
Similar questions