FYKOS Year 34 Series 2 Problem 5 — magnetic non-stationarities detector · FYKOS 34 #34.2.5
Physics · electromagnetism
Problem
The electrical circuit shown in the figure can serve as a non-stationary magnetic field detector. It consists of nine edges of a cube formed by electric wire. The electrical resistance of one edge is R. If this construction lies in a non-stationary homogeneous magnetic field, which has, for simplicity, a constant direction, and its magnitude changes slowly, then there are currents I1, I2, I3 flowing at the marked spots. With the knowledge of these currents, determine the direction of the magnetic field in space and also the dependence of its magnitude on time.