A square coil on the side of the 7.80cm and n=127 turns it is within a constant and uniform magnetic field of magnitude B=1.30T. The field is perpendicular to the plane of the coil, as shown in the figure. If the coil is pulled outward, at constant speed v; that is, the net force is zero and the coil is not accelerating; The time it takes to move the coil from "completely inside" to "completely out" of the field is change in time to time=0.16s. The coil has a total resistance of R=51.
a) What is the area with magnetic field enclosed by the coil at the start of the problem (A(t-0))? and the magnetic flow(theta(t-0))?
b) What's the speed of the coil?
c) What is the formula (in letters and numbers) of the area with magnetic field enclosed by the coil as time function (A(t)) in terms of d, v and t?
d) what is the value of the induced current? (magnitude and direction)
e) What is the magnitude of the F(ext) force exerted?
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