A very long magnet of pole strength 4A-m is placed vertically with its one pole on the table. At what distance from the pole, will there be a neutral point on the table? [`B_H = 4 xx 10^(-5)Wbm^(-2)`]

Explanation

To find the distance from the pole of a long magnet where the neutral point occurs on the table, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Problem**: We have a long magnet with a pole strength of \( m = 4 \, \text{A-m} \) placed vertically on a table. We need to find the distance \( d \) from the pole where the magnetic field strength \( B_H \) is given as \( 4 \times 10^{-5} \, \text{Wb/m}^2 \).

2. **Use the Formula for Magnetic Field**: The magnetic field \( B_H \) at a distance \( d \) from a magnetic pole is given by the formula:
\[
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