A single circular loop of copper wire with a radius of 2 m is in a uniform magnetic field that has an initial value of 5 T. The angle between the magnetic field and the central axis of the loop is 250. If the magnetic field increases at a constant rate of 2 T/s, what emf is induced in the loop? O 80 V O 57 V O 34 V 15 V O 23 V