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A long cylindrical volume contains a uniformly distributed charge of density ρ . The radius of cylindrical volume is R. A charge particle (q) revolves around the cylinder in a circular path. The kinetic energy of the particle is:

1. 0 2 4 qR ε ρ
2. 0 2 2 qR ε ρ
3. 2 0 R 4 q ε ρ
4. ρ ε q R 4 2 0

Correct answer: 0 2 4 qR ε ρ

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