Find the magnetic field at point $P$ due to given arrangements of current carrying wire.

$\left(\mathrm{a}\right)$ 

$\left(\mathrm{b}\right)$

$\left(\mathrm{c}\right)$ 

$\left(\mathrm{d}\right)$ 

$\left(\mathrm{e}\right)$ 

Three current elements marked $1, 2$ and $3$ carry current as shown. Also shown are two points in the region $A$ and $B.$ Choose the incorrect alternative.

A current carrying wire $AB$ with current $i_0$ is placed as shown in figure. Find the magnetic field at origin.

A long straight conductor is bent in form of a right angle as shown. It carries current $i.$ Magnetic field at point $\left(p, q\right)$ where $p>0, q>0,$ is

Find out the magnetic field at point $P$ in the following cases.

$\left(\mathrm{a}\right)$  Circular loop Iving in the $x-v$ plane

$\left(\mathrm{b}\right)$  Circular loop turned by $90°$ in anticlockwise direction

A spiral of $20$ turns with inner radius $R$ and outer radius $2R$ is placed as shown in figure. If the current is $i,$ find magnetic field at the centre of spiral.