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 The two spheres are slightly separated and the rod is then withdrawn.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