The magnetic flux linked with a coil is given by the equation: ΦB = 4t2 + 3t + 1.
To find the magnetic field at t = 2 sec, we evaluate the equation at t = 2 sec:
dB/dt = d/dt(4t2 + 3t + 1) = 8t + 3
At t = 2 sec, dB/dt = 8(2) + 3 = 14.
Therefore, the magnetic field at t = 2 sec is 14 T.
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