In cases like this one, where the magnetic field is perpendicular to the area of

Question

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 estimate the area—in this case that is the cross-sectional area of the person's body at approximately her waist when she is lying down

Part 2-Identify the Relationships What is the expression for magnetic flux? Assume the field is perpendicular to the area of interest. Part 3-Solve Estimate To evaluate the relation for the flux from Part 2, you need a value for the area A. What is a reasonable estimate for A? 75 Your value is a bit low. What is the cross-sectional area of your body, measured at your waist? cm2 Calculations (use your estimate) Using your estimate for A, what is the flux through the person's body? 0.05 Please check your arithmetic, and be sure to express the area in meters2. T m2

Explanation / Answer

I wear jeans of 34 inch waist. That is the circumference of my waist.

Hence the area would be

A = Circum^2/4 Pi = 595 cm^2

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