JEE Main 2019 — Physics solution | Fundamenthol

JEE Main2019Physics

Q.

The region between y = 0 and y = d contains a magnetic field $B = B \overset{z}{^} .$ A particle of mass m and charge q enters the region with a velocity $v = v \hat{i} .$ if , $d = \frac{m v}{2 q B},$ the acceleration of the charged particle at the point of its emergence at the other side is.

A
$\frac{q v B}{m} (\frac{1}{2} \hat{i} - \frac{3}{2} \hat{j})$
B
$-$ $\frac{q v B}{m} (\frac{3}{2} \hat{i} + \frac{1}{2} \hat{j})$
C
$\frac{q v B}{m} (\frac{i ^ + j ^}{2})$
D
$\frac{q v B}{m} (\frac{- j ^ + i ^}{2})$

Solution

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