Question

1. A rectangular coil of wire with sides W and H has N turns. To its right is a region of uniform constant magnetic field of magnitude B. The width of this region, L, is greater than W. The direction of the field is out of the page Starting outside the region of magnetic field, the coil moves with constant speed v to- wards, into, and out of the region of field, as shown. A light bulb of resistance R (assumed constant) is wired into the coil. The resistance of the wire is negligible compared to R Rectangular coil with N turns (a) When does an electric current flow through the light bulb? Consider the time region, entering intervals while the coil is entirely to the left of the magnetic field the region, entirely inside region, leaving the region, and entirely to the right of the region. Explain. (b) When the bulb is lit, what is the mechanical force (magnitude and direction) that (c) What is the total energy dissipated in the lightbulb as the coil moves into, through, d) Show that the total work done by the external force is equal to the total energy must be applied to the coil to keep it moving at constant speed v? and out of the region of magnetic field? dissipated in the lightbulb

Answer 1

dt I nc γ9ion and .lavi ug the reyon. B3 det K.

2. 尺 んノ 人) 心;