A negative charge, -q, has a mass, m, and an initial velocity, v, but is infinitely...

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Physics

A negative charge, -q, has a mass, m, and an initial velocity,v, but is infinitely far away from a fixed large positive charge of+Q and radius R such that if the negative charge continued atconstant velocity it would miss the center of the fixec charge by aperpendicular amount b. But because of the Coulomb attractionbetween the two charges the incoming negative charge is deviatedfrom its straight line course and attracted to the fixed charge andapproaches it. Find the closest distance the negative charge getsto the positive one.
Try to use work-energy theorem with U=(kq)/r and KE=(mv^2)/2

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3.6 Ratings (546 Votes)

First apply angular momentum conservation about the centre of the fixed positive charge then apply energy conservation theorem or workenergy theorem considering kinetic energy of negative charge and electrostatic See Answer

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