A 6.0-?F air-filled capacitor is connected across a 100-V potential source (a battery). After the battery fully charges the capacitor,
it is left connected and the capacitor is immersed in transformer oil, which has a dielectric constant of 4.5. How much additional charge flows from the battery onto the capacitor during this process?
A) 1.2 mC
B) 1.7 mC
C) 2.1 mC
D) 2.5 mC
C
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An inductor has a current I(t) = (0.500 A) cos[(275 )t] flowing through it. If the maximum emf across the inductor is equal to 0.500 V, what is the self-inductance of the inductor?
A) 4.37 mH B) 3.64 mH C) 2.75 mH D) 0.73 mH E) 1.43 mH
Why is UV astronomy difficult to do from the ground?
What will be an ideal response?
Lenses can be used to focus sunlight to a small point to burn paper or dry brush. A person demonstrates this using their own eyeglasses as the lenses. From this you can tell that
A. the person is either near- or farsighted but not both. B. the person is farsighted. C. the person is both near- and farsighted. D. the person is nearsighted.
Eclipses can occur only when, viewed from Earth, the Sun is near one of the ____ of the Moon's orbit
a. nodes b. points c. phases d. paths e. ecliptics