Question

Answer all questions. Show all work. All relevant diagrams must be clearly labeled and complete

The curves in Figure 1 describe the voltage and current characteristics for the inductor in a series R-L circuit in which the switch is closed at time t-0. When does the current in the inductor reach 80% of its final value? (a)Immediately (b)1.6 time constants after closing the switch (c) 1.2 time constants after closing the switch (d) 5.0 time constants after closing the switch. 11. 1.0 09 0.8 0.7 0.6 0.5 04 0.3 0.2 0.1 0.0 Figure 1 12. The plates of a parallel plate capacitor are 0.25 mm apart and have an area of50 cm2. The dielectric is mica with a relative permittivity of 5.0. What is the capacitance value?

Answer 1