Magnetic resonance imaging (MRI) devices use a very large magnet that produces a

Question

Magnetic resonance imaging (MRI) devices use a very large magnet that produces a large magnetic field Consider an MRI magnet that can accommodate a person. Typically, the person lies down and the field is paral lel to her spine (see the figure below). II lhe magnelic field has a magnilude B- 1.2 T, what ishe approximale lux through he person? In cases like this one, where the magnetic field is perpendicular to the area of interest, the magnetic flux depends only on the magnitude of the magnetic field and the area In this case we are given the magnitude B, but need to tate the area-in this case that is the cross-sectional area ot the person's body at approximately her waist when she is lying downsee the figure). Part 2-Identify the Relationships What is the expression for magnec fux? Assume the field is perpendicular to the area of interest -

Explanation / Answer

For value of cross sectional area of waist try 2600 cm².

For flux = 1.2×2600×10-4 = 0.312 T-m²

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