8001DS IDs A Set I Multiple Cholce (20 X 3 60 points) Ideniy the choice that bes

Question

8001DS IDs A Set I Multiple Cholce (20 X 3 60 points) Ideniy the choice that besn completes the statement or anowers the question. -1 . If we increase the distance between t the electrostatie force of interaction changes by a. 0.2 d. 0.02 In a thundercloud there may be an electric charge of 40 C near the top of the cloud and 40 C near the bo of the cloud. These charges are these two sets of charges? a. 2.3e4012 N b. 2.3e+008 N -2. c. 2.3e+006 N d. 2.3e+018 N A non-uniform electric field is represented by the diagram. At which of the following points is the field greatest in magnitude? b. B The capacitance of a capacitor is a function of its a. plate area, dielectric strength, and plate plate area, dielectric constant, and plate c. C d. D 4. separation temperature coefficient, plate area, and plate separation separation voltage supplied, dielectric constant, and plate separation b. d. 5. The slope of line for the plotted data points of a a. graph will yield the value of cap current vs. time charge vs. voltage current vs. voltage charge vs time c. b. d.

Explanation / Answer

Question 1) Electrostatic force is given by the formula

F = k*q1*q2/r^2

If the distance is increased by 10 times, r' = 10r

If one of the charges is increased by 2 times q1' = 2q1

So,

F' = k*2q1*q2/(10r)^2

F' = (2/100)*k*q1*q2/r^2

F' = 0.02*F

Thus the electrostatic force changes by 0.02

Answer ) option d)0.02

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