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11. In the circuit diagram below, if the current through resistor R, is 5-A down and if the current through resistor R, is 3 A up, what is the current in resistor R₁7 A) 8 A up B) 8 A down C) 2 A up Lwww R₂ R₁₂ R BWW A) 60 B) 80 C) 100 D) 12 02 E) 140 &₁ R ww www R 2 B₂ 12. Two negative point charges are separated by a distance of 5 m. If the distance between the charges is then increased by a factor of nine, the resulting force exerted by the charges on one another will be what factor times the initial value? A) 81 B) 9 C) 3 D) 2 A down E) 4 A down F) 4A up & D) % E) 1/9 F) 1/81 13. In the diagram below, R. 11, R₂-3, R, -4, R, -2, and R.-6. Find the equivalent resistance between points A and B for the combination of resistors shown in the figure below. R₁ R₂ wi www ww Ry R. 14. Two parallel plates contain equal and opposite charges. The potential difference between the plates is 500 volts, with the upper plate being at the higher potential. An alpha particle (with mass