Wednesday, 27 July 2016

electromagnetism - Why the electric bulb turns on almost instantly when the switch is closed?



The electron drift speed is estimated to be very low.How could there is current almost the instant a circuit is closed??
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By the discussions it is known that The information about beginning of the flow of current is transmitted through the propagation of electromagnetic waves(electric impulse)and not with the drift velocity of the electrons.
But I want any one to explain how this process takes place.CURIE:)




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