Answer to Question 1

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A magnetic field has a strength of 55 mT.    The field is concentrated into a rectangular area of dimension 5.0 cm 3.0 cm.  Calculate the flux.

F = BA = 55 10-3 T (0.050 m 0.03.0 m) = 8.25 10-5 Wb = 8.3 10-5 Wb (2 s.f.)