Magnetic Properties of Matter: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Magnetic Properties of Matter. Understanding the underlying formula is key to arriving at the correct answer below:

When a magnet of magnetic moment $M = m \times l$ is cut into two parts of equal length, the pole strength $m$ remains the same while the length becomes $l/2$. Thus, the new magnetic moment of each part is $M' = m \times (l/2) = M/2 = 0.5 M$.