A long cylinder (radius = 3.0 cm) is filled with a nonconducting material which carries a uniform charge density of 1.3 ?C/m3. Determine the electric flux through a spherical surface (radius = 2.0 cm) which has a point on the axis of the cylinder as its center.
A. 5.7 N ? m2/C
B. 4.9 N ? m2/C
C. 6.4 N ? m2/C
D. 7.2 N ? m2/C
E. 15 N ? m2/C
Answer: B
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Fill in the blank(s) with correct word
There are no radio telescopes in space because:
A) no one has built an antenna large enough to reach astronomical objects yet. B) radio telescopes are too fragile and expensive to make to put into space. C) there is too much radio noise in space, so a radio telescope won't work out there. D) radio waves penetrate Earth's atmosphere so there is no need to put one in space. E) you need an array, like the VLA, to detect ANY radio radiation, so it is just not realistic to put an entire array in space.
An AC voltage source, with a peak output of 114 V, is connected to a 40.0-? resistor. What is the effective (or rms) current in the circuit?
a. 2.02 A b. 1.43 A c. 2.85 A d. 4.03 A e. 5.70 A
If the voltage across a circuit of constant resistance is doubled, the power dissipated by that circuit will
A) be four times as large. B) be two times as large. C) decrease to one-half the original power. D) decrease to one-fourth the original power.