Lenz's Law Worksheet PHYS 421 First /Last Names 1. A circular coil is placed inside a circuit that has an emf and a switch. See figure on left. The switch is closed, held closed, and then opened. This results in the current in the circuit having the graph shown in the figure to the right. Determine the direction of the induced current in all three regions. Give answers as CW or CCW. Note that a current and its magnitude field are proportional to each other. I switch coil S first : held closed closed opened