jee-main 2004 Q41

jee-main · India Not Maths

A charged particle $q$ is shot towards another charged particle $Q$ which is fixed, with a speed $v$. It approaches $Q$ up to a closest distance $r$ and then returns. If $q$ were given a speed $2v$, the closest distance of approach would be
(1) $r$
(2) $2r$
(3) $r / 2$
(4) $r / 4$

A charged particle $q$ is shot towards another charged particle $Q$ which is fixed, with a speed $v$. It approaches $Q$ up to a closest distance $r$ and then returns. If $q$ were given a speed $2v$, the closest distance of approach would be\\
(1) $r$\\
(2) $2r$\\
(3) $r / 2$\\
(4) $r / 4$

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