The phase angle of an RLC series circuit with a capacitive reactance of 40 ?, a resistor of 100 ? and a certain inductor at 1000 Hz is 40.0°. What is the value of the inductance in this circuit?
A) 11.8 mH
B) 124 mH
C) 212 mH
D) 61.9 mH
E) 19.7 mH
E
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In the color wheel shown below, which colors are the primary colors?
A. red, yellow, blue B. orange, green, purple C. green, blue, purple D. yellow, orange, red
The electric potential at the surface of a charged conductor
a. is always zero. b. is always independent of the magnitude of the charge on the surface. c. may be set equal to zero by adding an appropriate constant to the potential at all points of space. d. is always such that the potential is zero at all points inside the conductor. e. is always such that the potential is always zero within a hollow space inside the conductor.
The radio waves emitted from Sagittarius A* region take how long to travel to Earth?
A. 220 million years B. 50,000 years C. 100,000 years D. 8.5 years
Two campers wish to start a fire during the day. One camper is nearsighted and one is farsighted. Whose glasses should be used to focus the Sun's rays onto some paper to start the fire?
1.either camper’s 2.the nearsighted camper’s 3.the farsighted camper’s