Subject: Physics / General Physics
A simple circuit consists of DC power supply and a light bulb. The plane of the circuit is in the xy?plane, perpendicular to a uniform magnetic field. The power supply drives a clockwise current when the circuit is viewed from the positive z?axis. Take the direction of the magnetic field to be the positive z?axis. Describe the brightness of the light bulb (dimmer, brighter or the same) as the magnetic field B is turned off and as it is turned back on.