In a certain region uniform electric field $E$ and magnetic field $B$ are present in the opposite direction. At the instant $t = 0,$ a particle of mass $m$ carrying a charge $q$ is given velocity $v_o$ at an angle $\theta ,$ with the $y$ axis, in the $yz$ plane. The time after which the speed of the particle would be minimum is equal to
In a certain region uniform electric field $E$ and magnetic field $B$ are present in the opposite direction. At the instant $t = 0,$ a particle of mass $m$ carrying a charge $q$ is given velocity $v_o$ at an angle $\theta ,$ with the $y$ axis, in the $yz$ plane. The time after which the speed of the particle would be minimum is equal to
- A
$\frac{{m{v_o}}}{{qE}}$
- B
$\frac{{m{v_o}\sin \theta }}{{qE}}$
- C
$\frac{{m{v_o}\cos \theta }}{{qE}}$
- D
$\frac{{2\pi m}}{{qB}}$
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