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    				| 1. | An iron rod of area ofcross-section `0.1m^(2)` is subjected to a magnetising field of `1000A//m`. Calculate the magnetic permeability of the iron rod. [Magnetic susceotibility of iron `=59.9`, magneitc permeability of vaccum `=4pixx10^(-7)` S.I. unit] | 
| Answer» Given: area of cross-section `(A)=0.1m^(2)` magnetising field `(H)=1000A//m` magnetic susceptibility of iron `(X_(m))` `=5.9` magnetic permeability of vacuum `(mu_(0))=4pixx10^(-7)Wb//A-m` Magnetic permeability `mu` is given by `mu=mu_(0)(1+X-(m))` `=4pixx10^(-7)(1+59.9)` `=4pixx10^(-7)xx60.9` `=765.29xx10^(-7)Wb//A-m` | |