direction of the induced current in the coil = counterclockwise (from lenz's law)
according to lenz law, induced current oppose the changing flux.
point your thumb in upward decreasing field and curl your firgers.
Here the direction of curling is counterclockwise. so, the direction of current is CCW.
lnduced emf in the loop,
e = -N*d / dt
e = -N*(B*A*cos) / dt
e = -30*[(0.35 - (-0.75))*pi*0.04^2*cos180] / 0.25
e = 0.6635 V
average induced current in the loop,
i = e / R
i = 0.6635 / 0.15
i = 4.42 A
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