Magnetic Effects & Magnetism

JEE Main level, single correct, medium

250 of 276

Question 250 of 276

The magnetic moment of an electron (e)\left(e\right) revolving in an orbit around nucleus with an orbital angular momentum is given by

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Answer: (B) μ⃗L=−eL2m{\vec{\mu }}_{L}=-\dfrac{eL}{2m}

When a charged body is rotating in a circle, the ratio of magnetic moment and angular momentum is given by,
μ⃗L⃗=q2m\dfrac{\vec{\mu }}{\vec{L}}=\dfrac{q}{2m}
The charge of electron q=−eq=-e
μ⃗=−e2mL⃗\vec{\mu }=-\dfrac{e}{2m}\vec{L}

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