College Physics (7th Edition)

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 - Multiple Choice Questions - Page 554: 8


(d) very much smaller

Work Step by Step

The gravitational force is $=G\frac{m_{1}m_{2}}{r^{2}}$, The electric force is $=k\frac{q_{1}q_{2}}{r^{2}}$. The mass of proton is in the range of $10^{-27}$kg, so the gravitational force will be very much smaller than the electric force. (d) is the answer.
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