A current carrying loop consists of $3$ identical quarter circles of radius $\mathrm{R}$, lying in the positive quadrants of the $\mathrm{xy}$ , $\mathrm{yz}$ and $\mathrm{zx}$ planes with their centres at the origin, joined together. Find the direction and magnitude of $\mathrm{B}$ at the origin.
I current carrying arc having a radius $\mathrm{R}$ subtend angle $\theta$ at centre point then, magnetic field is given by $\mathrm{B}=\frac{\mu_{0} \mathrm{I} \theta}{4 \pi \mathrm{R}}$.
Magnetic field at $O$ from current carrying loop at $x y$-plane, $\overrightarrow{\mathrm{R}_{\mathrm{n}}}=\frac{\mu_{0} \mathrm{I}}{4 \pi \mathrm{R}}\left(\frac{\pi}{2}\right) \hat{k}$
$\overrightarrow{\mathrm{R}_{\mathrm{n}}}=\frac{\mu_{0} \mathrm{I}}{4(2 \mathrm{R})} \hat{k}$
Magnetic field at $\mathrm{O}$ from current carrying loop at $y z$-plane, $\therefore \overrightarrow{\mathrm{R}_{\mathrm{n}}}=\frac{\mu_{0} \mathrm{I}}{4(2 \mathrm{R})} \hat{j}$
Magnetic field at $\mathrm{O}$ from current carrying at $z x$-plane,
$\therefore\overrightarrow{\mathrm{R}_{\mathrm{n}}}=\frac{\mu_{0} \mathrm{I}}{4(2 \mathrm{R})} \hat{j}$ $\therefore \overrightarrow{\mathrm{R}_{\mathrm{n}}} =\overrightarrow{\mathrm{R}_{1}}+\overrightarrow{\mathrm{R}_{2}}+\overrightarrow{\mathrm{R}_{3}}$ $=\frac{\mu_{0} \mathrm{I}}{4(2 \mathrm{R})}(\hat{i}+\hat{j}+\hat{k})$ $\overrightarrow{\mathrm{R}_{\mathrm{n}}}=\frac{\mu_{0} \mathrm{I}}{8 \mathrm{R}}(\hat{i}+\hat{j}+\hat{k})$
A wire carrying current $i$ is shaped as shown. Section $AB$ is a quarter circle of radius $r$. The magnetic field is directed
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?
Current $i$ is passed as shown in diagram. If radius of the circle is a, then the magnetic flux density at the centre $P$ will be:
Two insulated circular loop $A$ and $B$ radius ' $a$ ' carrying a current of ' $\mathrm{I}$ ' in the anti clockwise direction as shown in figure. The magnitude of the magnetic induction at the centre will be :
An element $\Delta l=\Delta x \hat{ i }$ is placed at the origin and carries a large current $I=10\; A$ (Figure). What is the magnetic field on the $y$ -axis at a distance of $0.5 \;m . \Delta x=1\; cm$