Question

In a coil of area 10 cm² and 10 turns with magnetic field directed perpendicular to the plane and is changing at the rate of 108 Gauss/second. The resistance of the coil is 20Ω. The current in the coil will be(a) 0.5 A(b) 5 A(c) 50 A(d) 5 × 10⁸ A

Answer 1

Solution퐼=휀푅=−푁휕Φ휕푡푅=−푁푆푅휕퐵휕푡=−1010−420∗104=−0.5А, “-” shows Lenz's law. Answer:0,5∗105А, direction is determined by Lenz's law