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Question:

Relation between magnetic moment and angular velocity is

M∝ω

M∝ω²

M∝√ω

None of these

Solution:

Magnetic moment,M=Ia=l(πr²)=qT×πr²(∵q=lt).As,ω=2πT ∴M=qωr²/2 ⇒M∝ω