What area plates would a parallel plate 1.0 F capacitor have with a plate separation of 0.10 mm and a dielectric of constant 10?
A. 1000
B. 5500
C. 130 
D. 
E. 
D.
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Why do you think air is such a poor conductor com-pared to a metal (at normal field strengths)?
A. Air is much less dense than a metal. B. Electrons can travel much farther in a metal before col-liding with an atom than they can in air. C. Air molecules are much bigger than metal atoms. D. Electrons move much more slowly in air. E. Air normally has very few free charge carriers.
You throw a ball straight up into the air. In addition to gravity, the ball feels a force due to air resistance. Compared to the time it takes the ball to go up, the time it takes to come back down is:
a) smaller b) the same c) greater
Two solid spheres, both of radius 5 cm, carry identical total charges of 2 µC. Sphere A is a good conductor. Sphere B is an insulator, and its charge is distributed uniformly throughout its volume. How do the magnitudes of the electric fields they separately create at a radial distance of 6 cm compare?
1. EA > EB = 0 2. EA > EB > 0 3. EA = EB > 0 4. 0 < EA < EB 5. 0 = EA < EB
An LRC ac series circuit has R = 15 ?, L = 25 mH, and C = 30 ?F. The circuit is connected to a 120-V (rms) ac source with frequency 200 Hz
(a) What is the average power dissipated by the circuit? (b) What is the power factor for the circuit?