1. The potential energy of a certain system of two charges increases as the charges aremoved farther apart. What does this tell us about the sign of the charges? Why?2. Show that volt per meter is the same as newton per coulomb.3. A student said "electric potential is always proportional to potential energy; whybother with the concept of potential at all? How would you respond?

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Answered: 1. The potential energy of a certain…

1. The potential energy of a certain system of two charges increases as the charges are moved farther apart. What does this tell us about the sign of the charges? Why?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter25: Electric Potential

Section: Chapter Questions

Problem 25.2CQ: Describe the motion of a proton (a) after it is released from rest in a uniform electric field....

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

1. The potential energy of a certain system of two charges increases as the charges are
moved farther apart. What does this tell us about the sign of the charges? Why?
2. Show that volt per meter is the same as newton per coulomb.
3. A student said "electric potential is always proportional to potential energy; why
bother with the concept of potential at all? How would you respond?

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