Impedance: A 120-V rms voltage is applied across a 6.00-?F capacitor and a 100-? resistor. If the frequency of the generator is 60.0 Hz, what is the impedance of this circuit?
A. 153 ?
B. 453 ?
C. 353 ?
D. 253 ?
E. 553 ?
Answer: B
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RC Circuits: A 8.0-?F uncharged capacitor is connected in series with a 6.0-k? resistor, an ideal 20-V dc source, and an open switch. If the switch is closed at time t = 0.0 s, what is the charge on the capacitor at t = 9.0 ms?
A. 0 C B. 37% of the minimum charge C. 17% of the maximum charge D. 68% of the minimum charge E. 96% of the maximum charge
A particle with a positive charge sits at rest near the south pole of a magnet as shown below. What is the direction of the magnetic force on the particle? Choose from the answers provided to the right and below the diagram.
A.A
B.B
C.C
D.D
E. Toward the viewer
F. Away from the viewer
T. There is no magnetic force on the particle.
The farthest galaxies visible in Hubble Space Telescope photos are about ________ light-years away.
A) 1 million B) 12 million C) 1 billion D) 12 billion E) 12 trillion
Most pulsars are known only as radio sources, but a few of the younger ones, like the Crab and Vela, also give off visible and even X-ray energy
Indicate whether the statement is true or false