Question

The magnetic susceptibility of an ideal diamagnetic substance is:

• A. +1
• B. -1
• C. 0
• D. infinity

Answer 1

Answer:

B. -1

• Magnetic susceptibility is a dimensionless quantity that measures the degree to which a material can be magnetized in response to an applied magnetic field. It indicates how easily a material gets magnetized.

• Mathematically, it is defined as the ratio of the intensity of magnetization ($M$) induced in the material to the applied magnetic field strength ($H$): $χ = M/H$.

• For the internal field to be zero ($B=0$), the susceptibility must be exactly -1.