Answer
$1.6\times10^{7}$ electrons
Work Step by Step
Charge of 1 electron = $-1.6\times10^{-19}C$
Let the number of electrons on the leaf end be n.
Thus , $-1.6n\times10^{-19}C=-2.5\times10^{-12}$
or , $n=1.6\times10^{7}$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 15 - Electric Charge, Forces, and Fields - Learning Path Questions and Exercises - Exercises - Page 556: 6
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