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$\bullet$ A proton and an elec-tron are separated as shownin Figure $17.52 .$ Points$A, B,$ and $C$ lie on the per-pendicular bisector of theline connecting these twocharges. Sketch the direc-tion of the net electric fielddue to the two charges at(a) point $A,$ (b) point $B,$and $(c)$ point $C .$
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Physics 102 Electricity and Magnetism
Chapter 17
Electric Charge and Electric Field
Gauss's Law
Electric Potential
Rutgers, The State University of New Jersey
University of Michigan - Ann Arbor
University of Washington
Hope College
Lectures
13:02
In physics, potential energy is the energy possessed by a body or a system due to its position relative to others, stresses within itself, electric charge, and other factors. The unit for energy in the International System of Units (SI) is the joule (J). One joule is the energy expended (or work done) in applying a force of one newton through a distance of one metre (1 newton metre). The term potential energy was introduced by the 19th century Scottish engineer and physicist William Rankine, although it has links to Greek philosopher Aristotle's concepts of potentiality. Potential energy is associated with forces that act on a body in a way that the work done by these forces on the body depends only on the initial and final positions of the body, and not on the specific path between them. These forces, that are called potential forces, can be represented at every point in space by vectors expressed as gradients of a scalar function called potential. Potential energy is the energy of an object. It is the energy by virtue of a position relative to other objects. Potential energy is associated with restoring forces such as a spring or the force of gravity. The action of stretching the spring or lifting the mass is performed by a force that works against the force field of the potential. This work is stored in the field, which is said to be stored as potential energy.
18:38
In physics, electric flux is a measure of the quantity of electric charge passing through a surface. It is used in the study of electromagnetic radiation. The SI unit of electric flux is the weber (symbol: Wb). The electric flux through a surface is calculated by dividing the electric charge passing through the surface by the area of the surface, and multiplying by the permittivity of free space (the permittivity of vacuum is used in the case of a vacuum). The electric flux through a closed surface is zero, by Gauss's law.
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A proton and an electron a…
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Two point charges of $1 \m…
07:08
Two point charges are sepa…
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$\bullet$$\bullet$ Two poi…
06:55
Three point charges lie al…
04:30
05:19
08:34
05:54
Three negative point charg…
03:33
The drawing shows a positi…
02:29
The two charges $q_{1}$ an…
It's so I'm drawn the situation here. We have a positive charge located up here and now you're charged located down here. To answer this problem, we have to remember the key fact about the direction of the electric field. E points away from the positive charges and tours the negative charges. And so at play, which I've drawn here, it's a little bit to the left. This positive charge will produce an electric field here. I'm going to call it eat. Plus, this negative charge will produce an electric field here. We're going to call you my ass The ex components of E plus and a minus point in opposite directions and are equal magnitude, so they perfectly canceled. But the white components combine to give you total Andy. Total points directly downward is larger than both the lie components of both. Because I add up now Barbie, which is located directly in the middle here, there will be no ex component due to either the plus charge or the minus charge. The plus charge simply causes the electric field to be pointed downward, and the minus charge also causes an electric field to be pointing downward. So it's called this left one he plus and the right one. You minus. Now the net electric field will be larger. Arrow pointed downward because the two arrows that make it up or also pointing downward, and so this will be a total. And that's what the situational back there. Now that part C we're going to have liked your fuel point this way due to this positive charge. So it's heat plus and I'm gonna have enter an arrow pointing this way due to this minus charge, it's supposed to be the same length as this other Arab. I didn't draw very well, like a point a. The ex components of these two leisure fields will cancel and the like. A bonus will combine. So we have the exact same answer as we did for point A. In this completes problem,
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