| ASSERTION: For a perfectly diamagnetic" substance permeability is zero. |
| REASON: The ability of material to permit the passage of magnetic lines of force through it is called magnetic permeability. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
For a perfectly diamagnetic substance, \[B={{\mu }_{0}}\left( H+I \right)=0\] \[\therefore \,\,\,\,I=-H\] Therefore, \[{{\chi }_{m}}=\frac{I}{H}=-1\] \[{{\mu }_{r}}=1+{{\chi }_{m}}=1-1=0\] \[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\mu ={{\mu }_{0}}{{\mu }_{r}}=zero\] i.e. for a perfectly diamagnetic material permeability is zero.
You need to login to perform this action.
You will be redirected in
3 sec
