Two parallel conductors A and B separated by 15 cm carry electric current of 9 A and 4 A in the same direction. Find the point between A and B where the field is zero.

Explanation

To find the point between two parallel conductors A and B where the magnetic field is zero, we can follow these steps:

### Step 1: Understand the Setup
We have two parallel conductors A and B separated by a distance of 15 cm. Conductor A carries a current of 9 A, and conductor B carries a current of 4 A in the same direction.

### Step 2: Define the Variables
Let:
- \( x \) = distance from conductor A to the point where the magnetic field is zero.
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