Fall 2012 Midterm 3 Solutions

a the current conduction displacement through the

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Unformatted text preview: acement) through the soup-can is not equal to the "current" (conduction + displacement) through the shaded surface. B) The conduction current through the soup-can is equal to the conduction current through the shaded surface. C) There must be conduction current (8/9)I flowing radially outward in the capacitor plate through the soup-can sides D) There must be conduction current of (3/4)I flowing radially outward in the capacitor plate through the soup-can sides E) There must be conduction current equal to (1/9)I flowing to the right through the shaded surface. 17. In a simple, purely inductive AC circuit a sinusoidally oscillating emf of angular frequency ω forces AC current to flow through a solenoid of inductance L. This AC current generates an oscillating magnetic field along the axis of the solenoid. The induced electric field that circulates around the axis inside the volume of the solenoid is: A) sinusoidal in time and its amplitude does not depend on ω B) sinusoidal in time and its amplitude is inversely proportional to ω C) constant D) 0, since the inductor/solenoid voltage is 90° out of phase with the current E) sinusoidal in time and its amplitude is proportional to ω The emf of the generator must always equal the emf of the inductor because of the loop law. But... the emf of the inductor is the integral of the electric field in the windings of the solenoid. That means that E depe...
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This document was uploaded on 03/11/2014 for the course PHYSICS 240 at University of Michigan.

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