In the above figure magnetic field at point $C$ will be
$\frac{{{\mu _0}i}}{{2\pi r}}\left[ {\left( {1 + \pi } \right)\hat k + \hat i} \right]$
$\frac{{{\mu _0}i}}{{4\pi r}}\left[ {\left( {1 + \pi } \right)\hat k - \hat i} \right]$
$\frac{{{\mu _0}i}}{{2\pi r}}\left[ {\left( {1 + \pi } \right)\hat k - \hat i} \right]$
$\frac{{{\mu _0}i}}{{4\pi r}}\left[ {\left( {1 - \pi } \right)\hat k + \hat i} \right]$
The magnetic field at the origin due to the current flowing in the wire is -
Find the magnetic field at point $P$ due to a straight line segment $AB$ of length $6\, cm$ carrying a current of $5\, A$. (See figure) $(\mu _0 = 4p\times10^{-7}\, N-A^{-2})$
Find the magnitude of magnetic field at point $p$ due to a semi - infinite wire given below
An electron is revolving round a proton, producing a magnetic field of $16\, weber/m^2$ in a circular orbit of radius $1\,\mathop A\limits^o $. It’s angular velocity will be
A Rowland ring of mean radius $15\; cm\;3500$ turns of wire wound on a ferromagnetic core of relative permeability $800.$ What is the magnetic field $B$ (in $T$) in the core for a magnetizing current of $1.2\; A?$