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a) The magnetic field is a certain region varies with time given by B(t) =30e^ -2t...

a) The magnetic field is a certain region varies with time given by B(t) =30e^ -2t in Tesla. A 10cm * 15cm rectangular coil whose plane is perpendicular to the direction of the magnetic is placed in this field, find the magnetic flux as a function of time flux(t).

b) A coil consists of 200 turns of wire. Each turn is a square of side d=18cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned on. If the field changes from 0 to 0.80T in 0.50s, what is the magnitude of the induced electromotive force, emf in the coil while the field was changing ?

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