MECHANICAL UNIVERSE

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41. As shown in the diagram above, a charged particle having mass m and charge -q is projected into the region
between two parallel plates with a speed v, to the right. The potential difference between the plates is V and
they are separated by a distance d. What is the net change in kinetic energy of the particle during the time it
takes the particle to traverse the distance d?
(A) + ; muo? (B)-aVId (C) TO% (D) +9V (E) None of tho above
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42. Two conducting spheres, one having twice the diameter of the other, are shown above. The smaller sphere
initially has a charge +q. When the spheres are connected by a thin wire, which of the following is true?
(A) 1 and 2 are both at the same potential.
(B) 2 has twice the potential of 1.
(C) 2 has half the potential of 1.
(D) 1 and 2 have equal charges.
(E) All of the charge is dissipated.

​50. PARTICLES AND WAVES

50. PARTICLES AND WAVES