A long straight wire , lying in horizontal plane is carrying 20 A of current from east to west. What is the magnetic field due to the wire at a point (i) 10 cm south from the wire and (ii) 20 cm upward in its vertical plane?

Explanation

To solve the problem of finding the magnetic field due to a long straight wire carrying a current of 20 A from east to west, we will use the formula for the magnetic field around a long straight conductor and the right-hand thumb rule to determine the direction of the magnetic field.

### Step-by-Step Solution:

**Step 1: Understand the Setup**
- The wire is oriented horizontally, carrying a current from east to west.
- We need to find the magnetic field at two different points:
(i) 10 cm south of the wire
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