Find the energy delivered by the source işi as a function of time. D2 220[2] 100[2} D1 300{L] |25[V] Vs = v/3 is = 0.015[A]

In the circuit below, switch S is initially disconnected from points A and B. The switch is then connected to A. What is the current and voltage in the resistors and inductor: a) as soon as the switch is turned on b) long after the key is turned on. The switch is then suddenly disconnected from A and connected to B: c) What is the current in the resistors at that moment? d) What is the voltage in the inductor? e) After that moment, what is the total energy dissipated by the resistors?

In the circuit below, the currents through the four resistors are as indicated. Use the junction rule to write the equations representing the relationship between the currents at the point d. (Use the following as necessary: 14, 15, and 16.) 16=14+15 X = 0 &₁ 15 R4 d E₂ =&

A point charge of 10uC is located x = 3, four infinite line charges of ρL = 50uC/cm and ρL = 20 uC/cm are located at x = ± 2 cm and x = ± 4 cm respectivelyand an infinite surface charge of ρS = 15μC/cm2 located at y = 4.5cm, find the totalcharge bounded by a sphere of radius 5cm with its center at the origin.