Determine the rms voltage drop across the inductor in the circuit.
A. 11 V
B. 27.5 V
C. 33 V
D. 38.5 V
E. 30.5 V
Answer: B
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Do physicists consider electromagnetic fields to be "real"?
A) No, because they are only an idea, imagined only by the human mind. B) Yes, because electromagnetic fields contain energy, even though they are not made atoms. C) Yes, because electromagnetic fields exert forces, even though they are not made of as atoms. D) No, because electromagnetic fields are not made of any material substance such as atoms. E) Yes, because electromagnetic fields are made of atoms.
The moons of Mars are believed to be
a. composed primarily of iron and nickel. b. composed primarily of frozen gases of water and carbon dioxide. c. orbiting Mars in a direction opposite to the direction that Mars rotates. d. formed from material ejected from Olympus Mons and other large volcanoes on Mars. e. captured asteroids.
The mass in the figure below slides on a frictionless surface.
When the mass is pulled out, spring 1 is stretched a distancex1from its equilibrium position and spring 2 is stretched a distancex2. The spring constants arek1andk2, respectively. The force pulling back on the mass is
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