The magnitude of the magnetic field in a magnetic resonance imaging (MRI) machine can be as great as B = 3.0 T . Under normal circumstances, this field cannot be shut off by just flipping a switch. Instead the magnitude needs to be carefully = 1.3x106 J decreased to zero. In an emergency, however, the magnet can be quenched? so that B reduces to My Answers .. zero in 20 s.

Such a quench can cost thousands of dollars and likely damages the magnets. Assume that the magnetic field exists inside a cylinder of Correct radius R = 400 mm and length l = 700 mm.

Part A How much magnetic potential energy is dissipated when the magnetic field is quenched in this way? Express your answer with the appropriate units. U^B=1.3 x10^6 J

Part B What is the average rate at which energy is dissipated? Express your answer with the appropriate units. Pavg=Value Units