RLC Circuits: A 120-V rms voltage at 2000 Hz is applied to a 6.0-mH inductor, a 2.0-?F capacitor, and a 200-? resistor. What is the rms value of the current in this circuit?
A. 1.5 A
B. 0.48 A
C. 2.5 A
D. 3.5 A
E. 0.59 A
Answer: E
You might also like to view...
Two ropes are attached to a 40-kg object. The first rope applies a force of 50 N and the second, 40 N. If the two ropes are perpendicular to each other, what is the resultant magnitude of the acceleration of the object?
a. 1.2 m/s2 c. 25 m/s2 b. 1.6 m/s2 d. 47 m/s2
An old bone sample contains 321 g of carbon and has an activity of 947 decays/min due to the carbon-14 in it. The half-life of carbon-14 is 5730 y. Assume that the activity of the atmospheric carbon is, and has remained, 0.255 Bq per gram of carbon
(a) How old is the sample? (b) What will be the activity of the sample 2000 y from now, in decays per minute?
Consider a solid sphere and a hollow sphere of the same radius, both made of material with the same density. They are both rotating on their axes with the same angular speed. Which one has the higher angular momentum?
1.the solid sphere 2.the hollow sphere 3.They both have the same angular momentum. 4.It is impossible to determine.
What provides the energy (and so light and heat) of a star?
A. Continual explosions B. Atomic energy/nuclear reactions C. Lots of electricity D. Chemical reactions at the surface E. Gravitational contraction