1. A coulomb is the same as:
 A. ampere/second
 B. (1/2)ampere × second2
 C. ampere/meter2
 D. ampere ×second
 E. newton ×meter2

2. The charge on a glass rod which has been rubbed with silk is called positive:
 A. by arbitrary convention
 B. so that the proton charge will be positive
 C. to conform to the conventions adopted for G and m in Newton's law of gravitation
 D. because like charges repel
 E. because glass is an insulator

3.

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 The two spheres are slightly separated and the rod is then withdrawn.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

4. Two small charged objects repel each other with a force F when separated by a distance d. If the charge on each object is reduced to one-fourth of its original value and the distance between them is reduced to d/2 the force becomes:
 A. F/16
 B. F/8
 C. F/4
 D. F/2
 E. F

5. Charges q1 and q2 are on the x axis, with q1 at x = a and q2 at x = 2a. For the net force on a another charge at the origin to be zero q1 and q2 must be related by q2=:
 A. 2q1
 B. 4q1
 C. –2q1
 D. –4q1
 E. –q1/4

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