A ring of mass m and radius R is given a charge q. It is then rotated about its axis with angular velocity `omega`.Find
(ii) Magnetic field produced at the centre of ring.

Explanation

To find the magnetic field produced at the center of a rotating charged ring, we can follow these steps:

### Step 1: Understand the problem
We have a ring with mass \( m \), radius \( R \), and charge \( q \) that is rotating about its axis with an angular velocity \( \omega \). We need to find the magnetic field \( B \) at the center of the ring.

### Step 2: Use the formula for the magnetic field of a current-carrying loop
The magnetic field \( B \) at the center of a circular loop carrying current \( I \) is given by the formula:
\[
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