An LRC ac series circuit has R = 15 ?, L = 25 mH, and C = 30 ?F. The circuit is connected to a 120-V (rms) ac source with frequency 200 Hz
(a) What is the average power dissipated by the circuit?
(b) What is the power factor for the circuit?
(a) 870 W (b) 0.95
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The boundary shown is that of a uniform magnetic field directed in the positive z direction. An electron enters the magnetic field with a velocity pointing along the x axis and exits 0.63 ?s later at point A. What is the magnitude of the magnetic field?
A. 18 ?T B. 14 ?T C. 28 ?T D. 34 ?T E. 227 ?T
The Doppler Effect is a phenomenon that allows one to measure an object's:
A) temperature. B) radius. C) radial motion. D) tangential motion. E) chemical composition.
A potential difference of 1.00 V is maintained across a 10.0-V resistor for a period of 20.0 s. What total charge passes by a point in one of the wires connected to the resistor in this time interval?
1.200 C 2.20.0 C 3.2.00 C 4.0.005 00 C 5.0.050 0 C
Relative to the age of the universe, how old is our solar system?
A) It is about 1% as old as the universe. B) It is between about 5 and 10% as old as the universe. C) It is about one third the age of the universe. D) It is nearly the same age as the universe.