The magnetic induction at the centre $O$ of the current carrying bent wire shown in the adjoining figure is
$\frac{{{\mu _0}I}}{{4\pi {R_1}}}\alpha $
$\frac{{{\mu _0}I}}{{4\pi {R_2}}}\alpha $
$\frac{{{\mu _0}I\alpha }}{{4\pi }}\left( {\frac{1}{{{R_1}}} - \frac{1}{{{R_2}}}} \right)$
$\frac{{{\mu _0}I\alpha }}{{4\pi }}\left( {\frac{1}{{{R_1}}} + \frac{1}{{{R_2}}}} \right)$
Magnetic field at point $'M'$ of given current distribution
A straight wire of diameter $0.5\, mm$ carrying a current of $1\, A$ is replaced by another wire of $1\, mm$ diameter carrying the same current. The strength of magnetic field far away is
In hydrogen atom, an electron is revolving in the orbit of radius $0.53\,{\mathop A\limits^o }$ with $6.6 \times {10^{15}}$ $rotations/second$. Magnetic field produced at the centre of the orbit is.......$wb/{m^2}$
Which of the field patterns given below is valid for electric field as well as for magnetic field?
Find the magnetic field at $P$ due to the arrangement shown