A flat coil of wire, consisting of 30 circular loops with a total resistance of

Question

A flat coil of wire, consisting of 30 circular loops with a total resistance of 20.0 ?, is placed so that it is at rest, flat on a table. The graphs below show the magnetic flux through each loop of the coil as a function of time, for three different cases. The units of flux are webers, which are equivalent to tesla meters2. The flux through each loop changes because the magnetic field changes. Assume that the field is uniform and the direction of the field is perpendicular to the plane of the coil 20.0 ?, is placed so that it is at rest, flat on a table. The graphs below show the magnetic flux through each loop of the coil as a function of time, for three different cases. The units of flux are webers, which are equivalent to tesla meters2. The flux through each loop changes because the magnetic field changes. Assume that the field is uniform and the direction of the field is perpendicular to the plane of the coil

Explanation / Answer

c) I = emf/R = dflux/dt/R = (.4/5)/20=0.004 A

d) I = emf /R = (.4/5)/20=0.004

e) so negative slope means clockwiseso
t-17s in case A
t-6 in case B
t=22 in case B
t-3 in case C
t-17 in case C

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