Problem 31051.

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A wire frame in the shape of an equilateral triangle is placed in a uniform magnetic field with induction B = 0.06 T, the direction of the lines of which makes an angle of 30° with the perpendicular to the plane of the frame. With a uniform decrease in induction to zero over time t = 0.03 s, an emf is induced in the frame. 30 mV. What is the side length of the frame?

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