Respuesta :
When the caterpillar takes to crawl 1cm if it crawls at the drift speed of an electron in the wire, then the time taken is 240.5 sec.
The average speed that charged particles—like electrons—achieve in a material as a result of an electric field is known as a drift velocity. An electron will typically move randomly across a conductor at the Fermi velocity, producing an average velocity of zero.
Vd = drift velocity
Δt = Δx / Vd
Vd = J / ne = i / Ane
Δt = Δx .Ane /i
= 10-2 * 2.123x10-5 *8.49*1028 *1.602*10-19 / 12
= 240.5 sec
the time it takes to crawl is 240.5 sec
The complete question is: A caterpillar of length 4cm crawls in the direction of electron drift along a 5.2mm diameter bare copper wire that carries a uniform current of 12 A. (a) How much time does it takes to crawl 1 cm if it crawls at the drift velocity of the electrons in the wire? (The number of charge carriers per unit volume is 8.49 x 10 28 m-3.)
Learn more about drift velocity here:
https://brainly.com/question/4269562
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