The magnetic field due to a current carrying square loop of side a at a point located symmetrically at a distance of $a/2$ from its centre (as shown is)
$\frac{{\sqrt 2 \,{\mu _0}i}}{{\sqrt 3 \,\pi \,a}}$
$\frac{{{\mu _0}\,i}}{{\sqrt 6 \,\pi \,a}}$
$\frac{{2\,{\mu _0}i}}{{\sqrt 3 \,\pi \,a}}$
zero
Find out magnetic field at point $O$ ?
State scientists research about electricity and magnetism after Oersted’s observation.
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
Write formula for magnetic field at centre of ring.
When the current flowing in a circular coil is doubled and the number of turns of the coil in it is halved, the magnetic field at its centre will become