A very long, tightly wound solenoid has a circular cross section of radius 2 cm (only a portion of the very long solenoid is shown in the ?gure below). The magnetic ?eld outside the solenoid is negligible. Throughout the inside of the solenoid, the magnetic ?eld B is uniform, to the left as shown, but varying with time t:B=(0.07+0.03t^2) tesla. Surrounding the circular solenoid is a loop of 7 turns of wire in the shape of a rectangle 11 cm by 18 cm. The total resistance of the 7-turn loop is 0.1 Ω
At t = 2 s, what is the magnitude of the current in the 7-turn loop?