Magnetic susceptibility of a substance is -0.925. What is its relative permeability?
Correct answer: B. 0.075
- A. 1.935
- B. 0.075
- C. 0.175
- D. 2.375
Explanation
The relative permeability μr is related to magnetic susceptibility Xm by the equation μr = 1 + Xm. For a given susceptibility Xm= -0.925, the relative permeability becomes μr=1+(-0.925)=1-0.925=0.075This indicates the material is diamagnetic with a μr less than 1. The negative susceptibility reduces the net magnetic field inside the substance.
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