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 mutually perpendicular planes. In this region a uniform magnetic field B of magnitude 100 mT is directed perpendicular to the diameter through A and makes angles of 30° and 60° 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
(a) instantaneous emf in the two loops are in the ratio √2 :1
(b) instantaneous emf in the two loops are in the ratio √3 :1
(c) the total emf between free ends at point A is 5 mV.
(d) the total emf between free ends at point A is 1.4 mV
