Shown in the figure is a conductor carrying a current $I$. The magnetic field intensity at the point $O$ (common centre of all the three arcs) is
$\frac{{5{\mu _0}I\theta }}{{24\pi r}}$
$\frac{{{\mu _0}I\theta }}{{24\pi r}}$
$\frac{{1{\mu _0}I\theta }}{{24\pi r}}$
zero
Due to $10\, ampere$ of current flowing in a circular coil of $10\, cm$ radius, the magnetic field produced at its centre is $3.14 \times {10^{ - 3}}\,Weber/{m^2}$. The number of turns in the coil will be
For adjoining fig., The magnetic field at point, $P$ will be
Gauss is unit of which quantity
A uniform circular wire loop is connected to the terminals of a battery. The magnetic field induction at the centre due to $A B C$ portion of the wire will be (length of $A B C=l_1$, length of $A D C=l_2$ )