Two infinitely long wires each carrying current $I$ along the same direction are made into the geometry as shown in the figure below. The magnetic field at the point $P$ is
$\frac{\mu_0 I}{\pi r}$
$\frac{\mu_0 I}{r}\left(\frac{1}{\pi}+\frac{1}{4}\right)$
zero
$\frac{\mu_0 I}{2 \pi r}$
The resistances of three parts of a circular loop are as shown in the figure. The magnetic field at the centre $O$ is :-
Three rings, each having equal radius $R,$ are placed mutually perpendicular to each other and each having its centre at the origin of co-ordinate system. If current $I$ is flowing thriugh each ring then the magnitude of the magnetic field at the common centre is
The magnetic induction at the centre of a current carrying circular coil of radius $10\, cm$ is $5\sqrt 5 \,times$ the magnetic induction at a point on its axis. The distance of the point from the centre of the coil (in $cm$) is
Find the magnitude of magnetic field at point $p$ due to a semi - infinite wire given below
A current loop, having two circular arcs joined by two radial lines is shown in the figure. It carries a current of $10\, A$. The magnetic field at point $O$ will be close to