In the circuit of the figure below, the switch S has been open for a long time. It is then suddenly closed. Take Ɛ = 10.0 V, R₁ = 47.0 kN, R₂ = 190 kn, and C = 15.0 μF. R₁ www 8 S www R₂ C i (a) Determine the time constant before the switch is closed. S (b) Determine the time constant after the switch is closed. S (c) Let the switch be closed at t=0. Determine the current in the switch as a function of time. (Assume I is in A and t is in s. Do not enter units in your expression. Use the following as necessary: t.) I =

1. A purely resistive circuit the current is leading by 90° with respect to voltage. 2. A purely inductive circuit the current is lag behind the voltage by 90°. 3. A purely capacitive circuit the current is lead by 90° with respect to the voltage. 4. A capacitor element stored magnetic energy. 5. An inductor element stored electrical energy. 6. Resistor elements consume power. 7. Angle between current and voltage is called power. 8. The power factor angle for a purely resistive is zero. 9. The power factor angle for a purely inductive load is -90°. 10. The power factor of a purely capacitive is leading.

The circuit is in continuity mode before the switch is opened. What is the initial voltage of the capacitor Uco before opening the switch. I Select one: O a. Uco = 0 O b. Uco = RI O c. Uco=E O d. Uco= E R k

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