magnetic field. One safety Magnetic resonance imaging (MRI) is a medical techniq
ID: 776804 • Letter: M
Question
magnetic field. One safety Magnetic resonance imaging (MRI) is a medical technique for producing plictures of the Interior of the body. The patient is placed within a strong concern is what would happen to the positively and negatively charged particles in the body induced emf could cause these particles to flow, 0.034 m2 and a normal that is paralel to a magnetic feld of 3.5T. Determine the smallest time period during which the feld can be allowed to vanish if the magnitude of the average induced emf is to be kept less than 0.010 v be shut of suddenly An producing an electric current within the body. Suppose the largest surface of the body through which flux passes has an area of fluilds if an equipment faiure caused the magnetic field to
Explanation / Answer
from the Faraday's Law for magnetic induction
emf = -/t
emf = -B*A/t
0.010 = -(0 - 3.5)*0.034/t
t = 11.9 s
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