The component of the external magnetic field along the central axis of a 50−turn coil of radius 5.0 cm increases from 0 to 1.0 T in 4.3 s. (a) If the resistance of the coil is 2.9 Ω, what is the magnitude of the induced current in the coil? (b) What is the direction of the current if the axial component of the field points away from the viewer? I am trouble starting this problem. Which equation am I suppose to start with. I am trying to use emf = vBL but I don't know what v would be. i tried to use Faraday's law equation but i didn't have all of the exponents.