calculate the electric potential at point (15cm, 0, 0) if the ring is placed parallel to y-z plane with centre at the origin and metallic ring with charge 0.02 μC made from a wire of length 12 cm.

Explanation

To calculate the electric potential at the point (15 cm, 0, 0) due to a metallic ring with charge, we can follow these steps:

### Step 1: Identify the parameters
- The charge \( Q \) on the ring is given as \( 0.02 \, \mu C = 0.02 \times 10^{-6} \, C \).
- The radius \( R \) of the ring can be calculated from its length. The length of the wire used to make the ring is \( 12 \, cm = 0.12 \, m \). Since the ring is circular, we can find the radius using the formula for the circumference of a circle:
\[ L = 2\pi R \implies R = \frac{L}{2\pi} = \frac{0.12}{2\pi} \approx 0.0191 \, m \]
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