Along bar magnet of time period T, used in vibration magnetometer is cut into four equal parts cutting it perpendicular to both length and breadth. Find the time period of one small part.

Explanation

To solve the problem of finding the time period of one small part of a bar magnet that has been cut into four equal parts, we can follow these steps:

### Step 1: Understand the Original Time Period Formula
The time period \( T \) of a bar magnet in a vibration magnetometer is given by the formula:
\[ T = 2\pi \sqrt{\frac{I}{M \cdot B}} \]
where:
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