PHY 2049 Midterm: University of Florida PHY 2049 exam4_sol
Document Summary
Before the switch is closed, no current ows only in any part of the circuit. As soon as the switch is closed, the branch with resistor. 2 carries current immediately, while the current in the branch with resistor 1 starts at zero and then moves to its nal value: a magnet is held near a large block of material with certain magnetic properties. 1 (c) if the material is paramagnetic, it would exert a (weak) attractive force on the magnet. The rst two statements follow from the de nitions of paramagnetic and diamagnetic. The last statement follows from the fact that the magnetic eld induced in the material is in the same direction as the applied. Therefore the north pole of the inducing eld is close to the south pole of the induced eld: an electromagnetic wave travelling parallel to the z-axis has intensity i0 and is linearly polarized in the x-direction.
