NEET UG PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

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Charge

{q_2}

of mass

m

revolves around a stationary charge

{q_1}

in a circular orbit of radius

r

The orbital periodic time of

{q_2}

would be

View answer and explanation

Correct option: A

{\left[ {\frac{{4{\pi ^3}m{r^2}}}{{k{q_1}{q_2}}}} \right]^{1/2}}

Option A (

{\left[ {\frac{{4{\pi ^3}m{r^2}}}{{k{q_1}{q_2}}}} \right]^{1/2}}

) is correct because the centripetal force is provided by the electrostatic force, and equating them allows solving for the period.

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