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
$\frac{{{\mu _0}I}}{{2R}}$
$\frac{3}{4}\left( {\frac{{{\mu _0}I}}{{2R}}} \right)$
$\frac{1}{4}\left( {\frac{{{\mu _0}I}}{{2R}}} \right)$
Magnetic field vector component because of ...... and electric field scalar component because of ......
Give convection for electric or magnetic field emerging out of the plane of the paper and going into the plane of paper.
Write proportionality constant of Biot-Savart law with unit and value (magnitude).
For the magnetic field to be maximum due to a small element of current carrying conductor at a point, the angle between the element and the line joining the element to the given point must be.......$^o$