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Choice he choice that best completes the statement or answers the question. i. Doug rubs a piece of fur on a hard rubber rod, giving

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Choice he choice that best completes the statement or answers the question. i. Doug rubs a piece of fur on a hard rubber rod, giving the rod a negative charge. What happens? a. Protons are removed from the rod. c. The fur is also charged negatively. b. Electrons are added to the rod. d. The fur is left neutral. object C has a charge 2q on it. These charges 2. Object A has a charge q on it, object B has a charge q on it, and I Which charge has the greatest magnitude are arranged, one each, at the vertices of an equilateral triangle. electric force on it? a. A b. B c. C d. All have equal magnitude forces on them. 3. Two point charges are 4 cm apart. They are moved to a new separation of 8 cm. By what factor does the f M resulting mutual force between them change? a. 1/2 c. 1/4r b.2 d.4 4. If the size of the charge value is tripled for one of two point charges maintained at a constant separation, the mutual force between them will be changed by what factor? a. 9.0. c. 0.33 b. 3.0 d. 1/9 5. The constant kg, which appears in Coulomb's law formula, is equivalent dimensionally to which of the following? a. N-m/C c. N-rnZ/C2 b. N/C d. N/C2 6. Two equal charges, each Q, are separated by some distance. What third charge would need to be placed hal' way between the two charges so that the net force on each charge would be zero? a. Q c. Q/4 . b. -Q/2 d. -Q/8 . ' 7. Three equal positive charges are placed on the x-axis, one at the origin, one at x = 2 m, and the third at x '= t m. Of the following points, which has the greatest magnitude electric eld? \\ * a x=lm h x=3m c x=5m d. The electric eld has the same magnitude at all three positions. Electric eld is dimensionally equivalent to which of the following? ' i " '\" ' c. N'mle2 d. N/C2

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