Magnetic field due to a ring having $n$ turns at a distance $x$ on its axis is proportional to (if $r$ = radius of ring)
Magnetic field due to a ring having $n$ turns at a distance $x$ on its axis is proportional to (if $r$ = radius of ring)
- A
$\frac{r}{{({x^2} + {r^2})}}$
- B
$\frac{{{r^2}}}{{{{({x^2} + {r^2})}^{3/2}}}}$
- C
$\frac{{n{r^2}}}{{{{({x^2} + {r^2})}^{3/2}}}}$
- D
$\frac{{{n^2}{r^2}}}{{{{({x^2} + {r^2})}^{3/2}}}}$
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