# DRIFT SPEED OF ELECTRON

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Hello friends,

I have heard that drift speed of electron is very slow.But my question is then how does bulb light instantly when we switch on??? And how did one calculate the drift speed of electron in a wire??

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How to calculate it:

http://en.wikipedia.org/wiki/Drift_velocity#Numerical_example

How a light bulb lights...

Imagine a tube full of marbles and open at both ends. These marbles will represent out electrons. Now what happens when you push a marble in the end?

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How to calculate it:

http://en.wikipedia....merical_example

How a light bulb lights...

Imagine a tube full of marbles and open at both ends. These marbles will represent out electrons. Now what happens when you push a marble in the end?

Understood!! but how to calculate the drift speed???

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The wikipedia link provides an example of how to calculate the drift velocity (it's a velocity not a speed as it has an associated direction).

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The wikipedia link provides an example of how to calculate the drift velocity (it's a velocity not a speed as it has an associated direction).

Thank you!!!

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