A cable 5 m above the ground carries a current of 50 A from south to north. Find the direction and magnitude of the magnetic field on the ground directly below the cable.

Explanation

To solve the problem of finding the direction and magnitude of the magnetic field on the ground directly below a cable carrying current, we can follow these steps:

### Step 1: Identify the parameters given in the problem
- Current (I) = 50 A (from south to north)
- Height of the cable above the ground (d) = 5 m

### Step 2: Use the formula for the magnetic field due to a long straight conductor
The magnetic field (B) at a distance (d) from a long straight conductor carrying current (I) is given by the formula:
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