Question

Physics 1102 Quiz 1A-Exp. 5 July 16 & 17, 2018 DIRECTIONS: Work the problem. You must show all work to receive credit, and you must return this sheet. Be sure to explain carefully your answers and show your work in a neat and organized manner. The problem is worth 20 points. A Faraday ice pail similar to the one you used is shown to the right. As you recall, the principle of its operation relies on the proportionality between the charge on the inner pail and the potential difference between the inner pail and ground. Suppose the relationship between potential difference V and the charge q is given | + |- by V-(3.00 x 1014) q. When a black wand and a white wand are inserted at the + same time into the ice pail (not touching the ice pail or each other), the electrometer reading is +15.0 volts. When only the black wand is removed, the electrometer reading changes to -12.0 volts, (a) What is the reading with only the black wand in the pail? (b) What is the charge on the white wand? (c) Suppose you consider the wands to be approximately point charges. What is the magnitude of the force between them if they are 2.50 cm apart? Is the force attractive or repulsive? (d) If both wands are inserted into the ice pail and both touch the sides of the ice pail, what is the electrometer reading when both ar experiment. Recall that (1/4m)-900 x 109 N m2/C e removed? You may assume no charge leakage during the

kindly solve parts A to D

Answer 1

We solve this problem by subtracting charge left from total charge when one of the wands is removed.

We calculate force between them using F =kq1*q2/r^2

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