An ac generator consists of 100 loops of wire, each of area 0.090 m2, and has a total resistance 12 ?. The loops rotate about a diameter in a magnetic field of 0.50 T at a constant angular speed of 60 revolutions per second
Find the maximum induced emf in the generator.
A) 1.7 kV B) 0.27 kV C) 0.54 kV D) 3.4 kV
A
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a. nuclear, gravitational b. chemical, potential c. kinetic, potential d. gravitational, thermal
Two charges, Q1 and Q2, are separated by a certain distance R. If the magnitudes of the charges are halved, and their separation is also halved, then what happens to the electrical force between these charges?
A) It increases by a factor of 16. B) It increases by a factor of 8. C) It is doubled. D) It is quadrupled. E) It remains the same.
A cup of water containing an ice cube at 0°C is filled to the brim. The tip of the ice cube sticks out of the surface. As the ice melts, you observe that
A) the cup overflows. B) the water level actually goes down. C) the water level remains the same. D) the cup might overflow but it depends on the actual mass of the ice cube. E) There is not enough information to answer this question.
A charged particle of mass 0.0020 kg is subjected to a 6.0 T magnetic field which acts at a right angle to its motion. If the particle moves in a circle of radius 0.20 mat a speed of 5.0 m/s, what is the magnitude of the charge on the particle?
A) 0.0083 C B) 120 C C) 0.00040 C D) 2500 C