A rectangular bar magnet of mass 100 g has length, breadth and thickness of 10 cm, 4 cm and 2 cm, respectively. Calculate its moment of inertia about an axis passing through its centre and parallel to its thickness.

Explanation

To calculate the moment of inertia of the rectangular bar magnet about an axis passing through its center and parallel to its thickness, we can follow these steps:

### Step 1: Identify the dimensions and mass of the magnet
- Mass (m) = 100 g = 0.1 kg (converting grams to kilograms)
- Length (L) = 10 cm = 0.1 m (converting centimeters to meters)
- Breadth (B) = 4 cm = 0.04 m (converting centimeters to meters)
- Thickness (T) = 2 cm = 0.02 m (converting centimeters to meters)

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