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Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
17
Electric Potential
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17-1 to 17-4: Electric Potential
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17-5: Potential Due to Point Charges
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17-7: Capacitance
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17-8: Dielectrics
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Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 19
Q

A point charge Q creates an electric potential of +165 V at a distance of 15 cm. What is Q?

A
2.8×10−9 C2.8 \times 10^{-9} \textrm{ C}
Giancoli 7th Edition, Chapter 17, Problem 19 solution video poster
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VIDEO TRANSCRIPT

This is Giancoli Answers with Mr. Dychko. This is the formula for the potential at a certain point r away from a charge Q and we can solve this for Q by multiplying both sides by r, dividing both sides by k and then switch the sides around and we get Q is r V over k so the distance is 15 centimeters, which is 15 times ten to the minus two meters and the voltage is positive 165 volts divided by coulomb’s constant 8.988 times ten to the nine newtons meter squared per coulomb squared and we get positive 2.8 times ten to the negative nine coulombs is the charge.

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Giancoli Answers, including solutions and videos, is copyright © 2009-2024 Shaun Dychko, Vancouver, BC, Canada. Giancoli Answers is not affiliated with the textbook publisher. Book covers, titles, and author names appear for reference purposes only and are the property of their respective owners. Giancoli Answers is your best source for the 7th and 6th edition Giancoli physics solutions.