A square coil of side d = 8.70 cm and N = 147 turns is within a constant and uniform magnetic field of magnitude B = 1.80 T. The field is perpendicular to the plane of the coil, as shown in the figure. If the coil is pulled out at constant speed v, that is, the net force is zero (Fnet = 0) and the coil is not accelerating; the time it takes to move the coil from '' completely in '' to '' completely out '' of the field is Δt = 0.13 s. The coil has a total resistance of R = 90 Ω. a) What is the area with magnetic field enclosed by the coil at the beginning of the problem (A (t = 0))? and the magnitude of magnetic flux (ΦB (t = 0))? A (0) = ΦB (0) = b) What is the speed of the coil? v = c) What is the formula (in letters) of the area with magnetic field enclosed by the coil as a function of time (A (t)) in terms of d, v and t? A (t) = (in letters) d) What is the value of the induced current? Magnitude: Direction: e) What is the magnitude of the force Fext exerted? Fext =
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