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Physics-

General

Easy

Question

An electron in the ground state of hydrogen atom is revolving in anticlockwise direction in the circular orbit of radius R The atom is placed in a uniform magnetic induction B such that the plane normal of electron orbit makes an angle 30⁰ with B, as shown in figure The torque experienced by electron will be

$\frac{e h B}{8 π m}$
$\frac{e h}{8 π B m}$
$\frac{e B}{8 π m h}$
$\frac{h B}{8 π e m}$

The correct answer is: $fraction numerator e h B over denominator 8 pi m end fraction$

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