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`        Positive charge Q is uniformly distributed throuhout the volume of a dielectic sphere of radius R. A ponit mass having charge +q and mass m is fired towards the centre of the sphere of velocity v from a point A at a distance r(r>R) from the centre of the sphere. Find tyhe minimum velocity v so that it can penetrate R/2 distance of the sphere.`
8 years ago

Nagaraju Kandru
31 Points
```										To solve the above problem,
we can use conservation of energy.
Total initial energy = Total final energy
K.E + Initial Electrostatic P.E = Final Electrostatic P.E
K.E = (1/2)mv2
Initial E.P.E = kQq / r
Final E.P.E = kQq(3R2 - R12) / (2R3)
where k = 9 × 109 , R1 = R/2, R = radius of the non conducting sphere.
r = initial seperation of the point mass from the centre of the sphere.
```
7 years ago
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