Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to L, but not touching it, as shown. The two spheres are slightly separated and the rod is then withdrawn. As a result:
A. both spheres are neutral
B. both spheres are positive
C. both spheres are negative
D. L is negative and M is positive
E. L is positive and M is negative
Answer: D. L is negative and M is positive
You might also like to view...
Two solenoids of equal length are each made of 2000 turns of copper wire per meter. Solenoid I has a 5.00-cm radius; solenoid II a 10.0-cm radius. When equal currents are present in the two solenoids, the ratio of the magnitude of the magnetic field BI along the axis of solenoid I to the magnitude of the magnetic field BII along the axis of solenoid II, BI/BII, is
A. 1/4. B. 1/2. C. 1. D. 2. E. 4.
An 80.0 kg person is riding in an elevator that is accelerating at 2.40 
downward. The apparent weight of the 80.0 kg person measured on a scale in the elevator
A. 592 N. B. 639 N. C. 784 N. D. 855 N. E. 976 N.
The waves of an earthquake are detected by an instrument called a
a. seismometer. b. seismogram. c. seismograph. d. seismoscope.
The low average densities of Jupiter and Saturn compared with Earth suggests ________.
A. they have no solid cores B. heavier elements must be in gaseous form in their interiors C. they are very hot D. they are hollow E. they contain large quantities of light elements, such as hydrogen and helium