A bar magnet is put on the hanger of oscillation magnetometer and is made to oscillate in earth's magnetic field. Frequency of oscillation of bar magnet is found to be 3 Hz at a place where horizontal component of earth's magnetic field is 25 `muT` . Now a short magnet is placed to the north of magnetometer in such a manner that its North Pole points towards north. Distance of short magnet from the bar magnet hanging inside the magnetometer is 1 m. Frequency of oscillation now becomes 6 Hz. What is magnetic moment of short magnet?

Explanation

To find the magnetic moment of the short magnet placed near the bar magnet in the oscillation magnetometer, we can follow these steps:

### Step 1: Understand the Problem
We have a bar magnet oscillating in the Earth's magnetic field with a frequency of 3 Hz. When a short magnet is placed nearby, the frequency increases to 6 Hz. We need to find the magnetic moment of the short magnet.

### Step 2: Use the Formula for Frequency of Oscillation
The frequency of oscillation of a magnet in a magnetic field is given by the formula:

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