An electroscope is charged positively as indicated by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves become
A) closer together.
B) farther apart.
C) motionless.
Answer: A
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A. 2.0 A B. 1.0 A C. 3.0 A D. 4.0 A E. 5.0 A
Consider an equilateral triangle of side 20. cm. A charge of +2.0 ?C is placed at one vertex and charges of -4.0 ?C are placed at the other two vertices. Determine the magnitude and direction of the electric field at the center of the triangle
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