question_answer

An iron rod of susceptibility 599 is subjected to a magnetizing field of \[1200\text{ }A\text{ }{{m}^{1}}\].

The permeability of the material of the rod is:

\[({{\mu }_{0}}=4\pi \times {{10}^{-7}}T\,m\,{{A}^{-1}})\]                                                                                                                                    [NEET 2020]

A)  \[8.0\times {{10}^{5}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]

B)  \[2.4\pi \times \text{ }{{10}^{5}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]

C)  \[2.4\pi \times {{10}^{7}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]

D)  \[2.4\pi \times {{10}^{4}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]

Correct Answer: A

Solution :

[a]

\[\delta =+25\]

\[{{B}_{v}}\]\[\to \]vertical downward \[\to \] Northern hemisphere

A \[\to \] Northern hemisphere

B \[\to \] Southern hemisphere