Question

Which magnetic materials have negative susceptibility?

• A. diamagnetic materials
• B. paramagnetic materials
• C. ferromagnetic materials
• D. all the above

Answer 1

Answer: (A)

diamagnetic materials

Answer 2

Diamagnetic substances gets slightly magnetised in opposite direction. Therefore, instensity of magnetisation is small and opposite to the direction of intensity of magnetising field for diamagnetic materials. Therefore, magnetic susceptibility $X _{ m }= I / H =- ve$