An LRC circuit has R = 15 ?, L = 25 mH, and C = 30 ?F. The circuit is connected to a 120 V (rms) 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
You might also like to view...
Which of the following supports the idea that the Martian crust is not divided into moving plates like those on Earth? I. the size of Olympus Mons II. the lack of folded mountain chains III. the lack of rift valleys outlining entire plates IV. the presence of dry river beds and sea floors
a. I & II b. II & III c. II, III & IV d. I, II, & III e. I, II, III, & IV
Waves on a String: A 90-gram wire that is 1.0 m long is under tension. When a transverse wave of frequency 890 Hz travels down the wire, its wavelength is 0.10 m and its amplitude is 6.5 mm. What is the tension in the wire?
A. 710 N B. 820 N C. 930 N D. 1000 N E. 1100 N
A 10-meter-long spear is thrown at relativistic speeds through a 10-meter-long pipe. (Both these dimensions are measured when each is at rest.) When the spear passes through the pipe
A) the spear appears to shrink so the pipe completely covers it. B) the pipe appears to shrink so the spear extends from both ends. C) both appear to shrink equally so the pipe barely covers the spear. D) any of these, depending on the motion of the observer (moving with the spear, at rest with the pipe, and so on). E) none of the above
More massive white dwarfs are smaller than less massive white dwarfs
Indicate whether the statement is true or false