OABC is a current carrying square loop an electron is projected f… - Vidyadip

MCQ

$OABC$ is a current carrying square loop an electron is projected from the centre of loop along its diagonal $AC$ as shown. Unit vector in the direction of initial acceleration will be

A
$\hat k$
✓
$ - \,\left( {\frac{{\hat i\, + \,\hat j}}{{\sqrt 2 }}} \right)$
C
$=- \hat k$
D
$\frac{{\hat i\, + \,\hat j}}{{\sqrt 2 }}$

✓

Answer

Correct option: B.

$ - \,\left( {\frac{{\hat i\, + \,\hat j}}{{\sqrt 2 }}} \right)$

b
$\vec{F}=-e(\vec{V} \times \vec{B})$

Force will be along $B O$ or unit vector

$=-\frac{\hat{i}+\hat{j}}{\sqrt{2} a}$

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