In the diagram below, a magnetic field links a circular copper ring. The field is uniform over the area of the ring and its strength is increasing in magnitude at a steady rate. magnetic fieldopposi airECTION to The (iii) The radius of the copper ring is 0.12 m and its resistance is 1.5 x 10-2 Q. The field strength is increasing at rate of 1.8 x 10" T s. Calculate the changing field value of the induced current in the copper ring. .A..-Il (314 ) (0.12me) 4.5- x10 2m 2 E = - N N Coso At... Is = 8. 1 x10 5 V (3) R = 8. 1 x 10 - 5 0 O R 5.4 x 10- 3 A 1.5 x 10 2 2 2