An 3.5 H inductor is connected in series to a 18 V battery, a resistor, and a switch which has been open for a long time. If the current through the inductor takes 4.6 s to reach 55 percent of its final value, what is the resistance? (in Ω) (a) 0.76 Ω

Among the four different settings for values of \( R \) and \( C \) in the circuit shown below, which setting would result in the initially charged capacitor discharging more rapidly after the switch is closed?: R = 3 Ω, C = 10 µF R = 5 Ω, C = 3 µF R = 3 Ω, C = 5 µF R = 2 Ω, C = 5 µF

An Alternating Current (AC) circuit has frequency v = 60 Hz. In such circuit there are 3 elements. The first one is a long thin solenoid with 4 × 104 turns/m, length of 10.0 cm and a cross-sectional area of 20.0 cm². The second one is a resistor with resistance R = 10.02. The third one is a parallel-plate capacitor is composed of two circular plates with radius 10.0 cmseparated by a gap of 0.05 mm. a) Calculate the angular frequency, w, of the circuit. b) Calculate the self inductance of such inductor and the inductive reactance. c) Calculate the capacitance of such device and the capacitive reactance. d) Draw the following functions on the same graph. Represent them as closely as possible to reality using the values you calculated so far. Use the graph on the back. IR cos (@t) VR IXL COS (@t+. VL = IXL COS VC = IXc cos wt- - - 元|2 元|2

The battery terminal voltage in the figure below is  = 7.70 V and the current I reaches half its maximum value of 7.00 A at t = 0.130 s after the switch is closed. A circuit contains a battery, a switch, an inductor, and a resistor. The circuit starts at the positive terminal of the battery labeled emf ℰ, goes through the switch labeled S, goes through the inductor labeled L, goes through the resistor labeled R and ends at the negative terminal of the battery. (a) Calculate the time constant ? (in s). ? s (b) What is the potential difference (in V) across the inductor at t = 0.130 s?  ?V (c) What is the potential difference (in V) across the inductor in the instant after the switch is closed at t = 0?  ?V