Current $i_0$ is moving in a hexagon shaped loop of side length $a.$ Find expression for magnetic field at centre of hexagon.

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 magnetic field at point $P$ in following cases.

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.

Find $\oint \overrightarrow{B}·\overrightarrow{dl}$ over following loops (direction in which integration has to be performed is indicated by arrows)

Two infinite sheets of current are carrying current $\lambda$ per unit length as shown in figure. Find magnetic field at points $A, B$ and $C.$