Electromagnetic Field Theory
A rectangular loop in the x – z plane bounded by the lines x = 0, x = a, z = 0 and z = b is in a time varying magnetic field is given by B = B0 cosωt + ay. Where B0 is constant, ω is angular frequency and ay unit vector in the y direction. Now the emf induced in the loop is given by

 Bo ω sinω t.
 Zero.
  abω Bo sinω t.
 ab Bo cosω t.

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Electromagnetic Field Theory
If an electric current carrying coil is placed in a uniform magnetic field in the direction of magnetic induction, then

 the net force is zero but torque is finite.
 the net force and torque on the coil are both zero.
 the net force and torque are both finite.
 the net force is finite but torque is zero.

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