Created by StemPy LabA wire bent into a semicircle of radius carries a current of . It lies in a uniform magnetic field of that is perpendicular to the plane of the semicircle, as shown in the figure. The magnitude of the total magnetic force on the semicircular wire is
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← Twelve identical resistors, each of resistance R, form the edges of a cube, as shown in the figure. A and B are the two ends of one edge. The other corners are named so that C and D are joined to A, E and F are joined to B, C is joined to E, D is joined to F, G is joined to C and D, and H is joined to E, F and G. The equivalent resistance between A and B isA long air-filled solenoid has 1000 turns, a length of 50 cm and a cross-sectional area of 10 cm². Take µ₀ = 4π × 10⁻⁷ T m/A. When a steady current of 2 A flows in it, the energy stored in its magnetic field is closest to →
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