11. Two point charges Q: and Q2 with the magnitude of 3.00 nC and -5.00 nc. respectively are separated by 0.25 m. Find the electric potential energy between both charges. (Given the Coulomb's constant, k = 8.99 x 10' Nm2/C2 ) * A. 5.39 x 10 7 J B. -5.39 x 10 7 J C. 2.16 x 10 7 J D. -2.16 x 107 J 12. What is the unit of electric field? * A. N/C B. NC C. N D. N/m2 C 13. A circuit consists of two resistors. If one of the resistors is 20 0, the equivalent resistance of the circuit can be reduced to 15 0 by adding * A. 5 0 resistor in series. B. 35 0 resistor in parallel. C. 45 0 resistor in series. D. 60 0 resistor in parallel. 14. Three resistors R1, R2 and Rs are connected in parallel. Given R1