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## Homework Statement

A ring of radius 6 cm that lies in the yz

plane carries positive charge of 7 μC uniformly

distributed over its length. A particle of mass

m carrying a charge of −7 μC executes small

oscillations about the center of the ring on its

axis with an angular frequency of 15 rad/s.

Find the angular frequency of oscillation of

the mass if the radius of the ring is doubled

while keeping the linear charge density on the

ring constant.

## Homework Equations

F = kQq/r

^{2}

## The Attempt at a Solution

I don't even know where to start with this one. To be honest, I'm not entirely sure what's actually going on. Is the particle going around the ring? Is it going right through it? I have no idea.