A copper wire of diameter 1.6 mm carries a current of 20A. Find the maximum magnitude of the magnetic field (vec B)due to this current.

Explanation

To find the maximum magnitude of the magnetic field (B) due to a current-carrying copper wire, we can follow these steps:

### Step 1: Identify the given values
- Diameter of the copper wire (d) = 1.6 mm = 1.6 × 10^-3 m
- Current (I) = 20 A

### Step 2: Calculate the radius of the wire
The radius (r) is half of the diameter:
...