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5.Magnetism and Matter
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Due to a small magnet intensity at a distance $x$ in the end on position is $9$ $Gauss$. What will be the intensity at a distance $\frac{x}{2}$ on broad side on position..... $Gauss$
A
$9$
B
$4$
C
$36$
D
$4.5$
Solution
(c) In $C.G.S$. ${B_{axial}} = 9 = \frac{{2M}}{{{x^3}}}$…..$(i)$
${B_{{\rm{equaterial}}}} = \frac{M}{{{{\left( {\frac{x}{2}} \right)}^3}}} = \frac{{8M}}{{{x^3}}}$…..$(ii)$
From equation $(i)$ and $(ii)$ ${B_{{\rm{equaterial}}}} = 36\,$ $Gauss$.
Standard 12
Physics
