A 100-W light bulb is connected to a 110-V source. What current flows through the lamp?
A) 1.1 A
B) 2.2 A
C) 3.3 A
D) 4.4 A
E) 0.91 A
E
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Magnetic fields are produced by
A) a tiny fraction of moving electrical charges. B) most moving electrical charges. C) all moving electrical charges.
You are a passenger on a spaceship. As the speed of the spaceship increases, you would observe
A) your watch slowing down. B) your watch speeding up. C) your watch losing time. D) your watch gaining time. E) nothing unusual about your watch.
When sound travels faster higher in the air than it does closer to the ground, sound bends
A) upward. B) downward. C) neither of these
The main reason that there is a limit to the size of a stable nucleus is
A) the limited range of the gravitational force. B) the short range nature of the strong nuclear force. C) the weakness of the gravitational force. D) the weakness of the electrostatic force.