A 40cm x 15 cm rectangular loop of wire is being pulled into a region of uniform magnetic field B directed into the plane of the paper. A constant force Fext=0.60 N must be applied to the loop to maintain a constant speed of 4.0m/s. The resistance of the loop is 9.6ohms.
A) What is the magnitude of the magnetic field B?
B) What is the magnitude of the emf induced in the loop?