Electric Potential Energy of Charged Particles JEE Notes | EduRev

Physics For JEE

JEE : Electric Potential Energy of Charged Particles JEE Notes | EduRev

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Potential Energy of a System of two Charged Particles

Figure shows two + ve charges q1 and q2 separated by a distance r. The electrostatic interaction energy of this system can be expressed as work done in bringing charge q2 from infinity to the given separation from q1.
Electric Potential Energy of Charged Particles JEE Notes | EduRevIt can be calculated as
Electric Potential Energy of Charged Particles JEE Notes | EduRev
[ – ve sign shows that x is decreasing]

Electric Potential Energy of Charged Particles JEE Notes | EduRev
If the two charges are of opposite signs, then potential energy will be negative as 

Electric Potential Energy of Charged Particles JEE Notes | EduRev


Potential Energy for a System of Charged Particles

When more than two charged particles are there in a system, the interaction energy can be given as the sum of interaction energies of all the different possible pairs of particles. For example if a system of three particles having charges q1, q2 and q3 is given as shown in figure.
Electric Potential Energy of Charged Particles JEE Notes | EduRevThe total interaction energy of this system can be given as
Electric Potential Energy of Charged Particles JEE Notes | EduRev 

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