A circular loop of conducting wire of radius 1 cm is cut at a point...

A circular loop of conducting wire of radius 1 cm is cut at a point A on its circumference. It is then folded along a diameter through A such that the two semicircular loops lie in two mutuially perpendicular planes. In this region a uniform magnetic field $\vec{B}$ of magnitude 100 mT is directed perpendicular to the diameter through A and makes angles of $30^{{}^{{}^{\circ}}}$ and $60^{{}^{{}^{\circ}}}$ with the planes of the two semicircles. The magnetic field reduces at a uniform rate from 100 mT to zero in a time interval of 4.28 ms . Therefore,