A long cylindrical volume contains a uniformly distributed charge of density $\rho$. 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 :

Question

${{\rho q{R^2}} \over {4{\varepsilon _0}}}$

${{\rho q{R^2}} \over {2{\varepsilon _0}}}$

${{q\rho } \over {4{\varepsilon _0}{R^2}}}$

${{4{\varepsilon _0}{R^2}} \over {q\rho }}$

Solution

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