Cant understand this line in the book(semiconductor nightmare 4)

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The discussion centers on a specific line in "Semiconductor Nightmare 4" regarding the increase in velocity. Participants clarify that the relationship is derived from Newton's second law, where force (F) equals mass (m) times acceleration (a). They explain that in this context, the force is related to electric charge (q) and electric field (E), leading to the expression for change in velocity (∆v). The formula presented is ∆v = -eEt/m, illustrating how velocity increases under the influence of an electric field. This mathematical derivation helps clarify the previously confusing line in the book.
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in the marked red line
how they comeup with the fact the the velocity increases by this amount
?
i didnt see this expression before in this book
 
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nhrock3 said:
how they comeup with the fact the the velocity increases by this amount

Hi nhrock3! :smile:

F = ma = m(dv/dt) …

In this case, F = qE = -eE, so m(dv/dt) = qE, so ∆v = -eEt/m. :wink:
 
thanks :)
 

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