Electric Potential Energy And Electric Potential Pdf
File Name: electric potential energy and electric potential .zip
The section of CBSE Class 12 Physics electrostatic potential and capacitance notes mainly deals with the in-depth analysis of electromagnetic phenomena when they are not performing any movements.
Electric Potential lectric Potential Energy. Why is this ok? Remember we can always add or subtract a constant From the potential energy since we only care about changes! Example What is the change in electric potential energy?
Physics of the Life Sciences pp Cite as. In the last chapter we discussed the forces acting between electric charges. Electric fields were shown to be produced by all charges and electrical interactions between charges were shown to be mediated by these electric fields. In this chapter we introduce the concept of electric potential energy and electric potential, and apply these considerations to a variety of situations. The fundamental electric interactions in atomic, macroscopic, and macromolecular systems are each presented. Biological membranes are discussed in some detail, with emphasis on their ability to act as capacitors, energy storage devices. Membrane channels are introduced, focusing on sodium channels: how they work and how they are selective.
The electric potential also called the electric field potential , potential drop, the electrostatic potential is the amount of work energy needed to move a unit of electric charge a Coulomb from a reference point to the specific point in an electric field with negligible acceleration of the test charge to avoid producing kinetic energy or radiation by test charge. Typically, the reference point is the Earth or a point at infinity , although any point can be used. More precisely it is the energy per unit charge for a small test charge that does not disturb significantly the field and the charge distribution producing the field under consideration. By dividing out the charge on the particle a quotient is obtained that is a property of the electric field itself. In short, electric potential is the electric potential energy per unit charge. The electric potential at infinity is assumed to be zero.
3.1 Electric Potential Energy
In the previous section of Lesson 1 , it was reasoned that the movement of a positive test charge within an electric field is accompanied by changes in potential energy. A gravitational analogy was relied upon to explain the reasoning behind the relationship between location and potential energy. Moving a positive test charge against the direction of an electric field is like moving a mass upward within Earth's gravitational field. Both movements would be like going against nature and would require work by an external force. This work would in turn increase the potential energy of the object. On the other hand, the movement of a positive test charge in the direction of an electric field would be like a mass falling downward within Earth's gravitational field.
We differentiate between the concepts of electric potential energy and electric potential by exploring electric potential energy qualitatively, looking at a charge between two parallel plates, and solving for electric potential in an example problem. Construct an explanation based on evidence of the behavior of charges in terms of electric potential energy. GPB offers the teacher toolkit at no cost to Georgia educators. You only need to submit this form one time to get materials for all seven units. Support Materials. Obtain, evaluate, and communicate information about electrical and magnetic force interactions. Learning Objectives -Compare and contrast electric potential energy and gravitational potential energy.
Electric Potential Energy in a Uniform Field: When a charged particle moves in an electric field, the field exerts a force that can do work on the particle. The work.
Electric Energy and Potential
Recall that earlier we defined electric field to be a quantity independent of the test charge in a given system, which would nonetheless allow us to calculate the force that would result on an arbitrary test charge. The default assumption in the absence of other information is that the test charge is positive. We briefly defined a field for gravity, but gravity is always attractive, whereas the electric force can be either attractive or repulsive. Therefore, although potential energy is perfectly adequate in a gravitational system, it is convenient to define a quantity that allows us to calculate the work on a charge independent of the magnitude of the charge.
Recall that earlier we defined electric field to be a quantity independent of the test charge in a given system, which would nonetheless allow us to calculate the force that would result on an arbitrary test charge. The default assumption in the absence of other information is that the test charge is positive. We briefly defined a field for gravity, but gravity is always attractive, whereas the electric force can be either attractive or repulsive. Therefore, although potential energy is perfectly adequate in a gravitational system, it is convenient to define a quantity that allows us to calculate the work on a charge independent of the magnitude of the charge. Since U is proportional to q , the dependence on q cancels.
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