For the wire arrangement in the figure, a = 12.9 cm and b = 17.3 cm. The current in the long straight wire is given by i = 5.86t2 - 13.1t, where i is in amperes and t is in seconds.
(a) Find the emf in volts in the square loop at t = 4.38 s.
(b) What is the direction of the induced current in the loop?
