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