A disc of mass m, radius r and carrying charge q, is rotating with angular speed `omega` about an axis passing through its centre and perpendicular to its plane. Calculate its magnetic moment

Explanation

To calculate the magnetic moment of a rotating charged disc, we can follow these steps:

### Step 1: Understand the relationship between magnetic moment and angular momentum
The magnetic moment (μ) is related to the angular momentum (L) of the rotating disc by the formula:
\[ \frac{\mu}{L} = \frac{Q}{2m} \]
where \(Q\) is the total charge on the disc, and \(m\) is the mass of the disc.
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