A current $I$ enters a circular coil of radius $R$, branches into two parts and then recombines as shown in the circuit diagram. The resultant magnetic field at the centre of the coil is
Zero
$\frac{{{\mu _0}I}}{{2R}}$
$\frac{3}{4}\left( {\frac{{{\mu _0}I}}{{2R}}} \right)$
$\frac{1}{4}\left( {\frac{{{\mu _0}I}}{{2R}}} \right)$
A hollow cylinder having infinite length and carrying uniform current per unit length $\lambda$ along the circumference as shown. Magnetic field inside the cylinder is
A very long conducting wire is bent in a semicircular shape from $A$ to $B$ as shown in figure. The magnetic field at point $P$ for steady current configuration is given by:
What is the magnetic field at a distance $R$ from a coil of radius $r$ carrying current $I$ ?
A circular current carrying coil has a radius $R$. The distance from the centre of the coil on the axis where the magnetic induction will be $\frac{1}{8}^{th}$ to its value at the centre of the coil, is
Tesla is the unit of