Question
Physics Question on Magnetic Field
To shield an instrument from an external magnetic field it may be placed in a cabinet made of :
A
wood
B
ebonite
C
metal
D
diamagnetic substance
Answer
wood
Explanation
Solution
Magnetic field lines avoid passing through diamagnetic materials. Due to this reason, the bar of diamagnetic material aligns perpendicular to the magnetic field. Magnetic field lines prefer passing through the paramagnetic materials. So, the bar of paramagnetic material aligns parallel to the magnetic field.