Created by StemPy LabTwelve identical resistors, each of resistance , 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 is
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← A parallel-plate capacitor with plate separation d is charged by a battery and then disconnected from it. A metal slab of thickness d/2, with the same area as the plates, is now slid in between the plates, parallel to them, without touching them. Compared with the values before the slab was put in, the capacitance, the potential difference and the stored energy becomeA wire bent into a semicircle of radius 10 cm carries a current of 5 A. It lies in a uniform magnetic field of 0.2 T 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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