1. An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.1 T field with his fingers pointing in the direction of the field. (a) Find the average emf induced in his wedding ring, given its diameter is 2.4 cm and assuming it takes 0.2 s to move it into the field. emf = (b) Discuss whether this current would significantly change the temperature of the ring. Assume tha the resistance of the ring is R-1 ma. Hint: How much power is dissipated in the ring? How is power related to the energy in form of heat. Note: The energy required to heat 1 gram of water by 1 degree Celcius is about 4.2). The ring will get noticeably hot The ring will not change much in temperature

1. An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.1 T field with his fingers pointing in the direction of the field. (a) Find the average emf induced in his wedding ring, given its diameter is 2.4 cm and assuming it takes 0.2 s to move it into the field. emf = (b) Discuss whether this current would significantly change the temperature of the ring. Assume tha the resistance of the ring is R-1 ma. Hint: How much power is dissipated in the ring? How is power related to the energy in form of heat. Note: The energy required to heat 1 gram of water by 1 degree Celcius is about 4.2). The ring will get noticeably hot The ring will not change much in temperature