8. What is the potential difference VB-VA when I=0.50 A in the circuit segment shown below? 10 Ω Aww 16 Ω www. B 15 V a) +28 V b) +2.0 V c) -28 V d) -2.0 V e) +18 V FinalA-Page 4 Physics 2220 Final Exam 9. The figure shows the result from an electric measurement in the given circuit. Interpret the I-t graph a) When the switch is opened the charge on the capacitor decreases from lo to zero in about the time of 21. b) When the switch is closed at r-0 the current starts with le and decreases exponentially with time while discharging the capacitor. The parameter t gives the ratio Ile. c) When the switch is closed at 1-0 the current A Je ++ T Spring 2017 C R HH starts with le and decreases exponentially with time while charging the capacitor. The parameter t gives the time constant which characterizes how fast the charging of the capacitor occurs. d) When the switch is closed at r-0 the current starts with Jo and decreases exponentially with time while charging the capacitor. The parameter t gives the time when the capacitor is fully charged.