The magnetic field intensity at the point $O$ of a loop with current $i$, whose shape is illustrated below is
$\frac{\mu_0 i}{4 \pi}\left[\frac{3 \pi}{2 a}+\frac{\sqrt{2}}{b}\right]$
$\frac{\mu_0 i}{4 \pi^2}\left[\frac{2}{a}+b\right]$
$\frac{\mu_0 i}{2 \pi}\left[\frac{1}{a}+\frac{1}{b}\right]$
$\frac{\mu_0 i}{4 \pi}\left[\frac{1}{a}+\frac{1}{b}\right]$
The radius of a circular current carrying coil is $R$. At what distance from the centre of the coil on its axis, the intensity of magnetic field will be $\frac{1}{2 \sqrt{2}}$ times that at the centre?
An electron moves in a circular orbit with a uniform speed $v$. It produces a magnetic field $B$ at the centre of the circle. The radius of the circle is proportional to
What will be the resultant magnetic field at origin due to four infinite length wires. If each wire produces magnetic field '$B$' at origin
If induction of magnetic field at a point is $B$ and energy density is $U$ then which of the following graphs is correct
If wire of length $L$ form a loop of radius $R$ and have $n$ turn. Find magnetic field at centre of loop if current flowing in loop is $I$