The magnetic potential at a point on the axial line of a bar magnet of dipole moment M is V. What is the magnetic potential due to a bar magnet of dipole moment M4 at the same point ?

A. 4V
B. 2V
C. `V/2`
D. `V/4`

Options

A. 4V
B. 2V
C. `V/2`
D. `V/4`

Explanation

To solve the problem, we need to find the magnetic potential due to a bar magnet with a dipole moment of \( \frac{M}{4} \) at the same point where the magnetic potential due to a bar magnet with dipole moment \( M \) is \( V \).

### Step-by-Step Solution:

1. **Understanding the Magnetic Potential**:
The magnetic potential \( V \) at a point on the axial line of a bar magnet is given by the formula:
\[
V = \frac{\mu_0}{4\pi} \cdot \frac{M}{d^2}
...