A series RLC circuit has a 100-? resistor, 2.00-mH inductor and a 4.00-?F capacitor connected across a 120-V rms ac source at (1000/?) Hz. What is the power dissipated by the circuit?
A) 184 W
B) 18.6 W
C) 58.4 W
D) 91.8 W
E) 180 W
C
Physics & Space Science
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Intensity: The intensity of the waves from a point source at a distance d from the source is I. At what distance from the sources is the intensity equal to 2I?
A. d/2
B. d/
C. d/4
D. d/8
Physics & Space Science
An increase of 40 dB increases the sound intensity by a factor of
a. 1000. b. 40000. c. 10000. d. 4000.
Physics & Space Science
Tensile stress is
A) the strain per unit length. B) the same as force. C) the ratio of the change in length. D) applied force per cross-sectional area.
Physics & Space Science
A light beam has speed c in vacuum and speed v in a certain plastic. The index of refraction n of this plastic is
A) n = cv. B) n = (v/c)2. C) n = v/c. D) n = c/v. E) n = (c/v)2.
Physics & Space Science