Phase Angles: A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A, and it leads the voltage by 60°. What is the resistance in this circuit?
A. 100 ?
B. 150 ?
C. 120 ?
D. 60 ?
E. 200 ?
Answer: A
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Fill in the blank(s) with the appropriate word(s).
Reactance: What rms current flows in a 60-mH inductor when 120-V rms ac at a frequency of 20 kHz is applied to it?
A. 8.0 mA B. 16 mA C. 24 mA D. 32 mA
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A. gray, black, and white like a medical X ray B. brighter than normal because X rays carry more energy than visible light photons C. dark because X-ray light does not reach Earth’s surface D. green, yellow, and orange, because those are the colors of X rays
In the two-slit experiment, the distance between the slits and the screen is 1.10 m and the distance between the slits is 0.100 mm
If the first-order bright fringe is measured to be 3.40 cm from the centerline, what is the wavelength of light? A) 354 nm B) 241 nm C) 133 nm D) 3.10 ?m E) 2.11 ?m