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what accelerates the electron in the thin part of a current-carrying wire?

what accelerates the electron in the thin part of a current-carrying wire?

Grade:11

2 Answers

Mukesh Sharma
askIITians Faculty 43 Points
10 years ago

Consider a thick wire that narrows for some part of its length, connected to the terminals of a battery, hence carrying some current.

Presumably the electrons have to speed up as the wire gets thinner - if the current is constant everywhere, then if the wire cross-section is less, they have to go through faster in order for the same number of electrons to pass any point in a given time.


Thanks and regards

askIITians faculty

mukesh sharma

Saurabh Singh
askIITians Faculty 49 Points
10 years ago

The speed (drift) of the electrons has nothing to do with the area.

v=µeE

Thanks & Regards
Saurabh Singh,
askIITians Faculty
B.Tech.
IIT Kanpur

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