Question

Problem 2. Multiple-choice: (15 pts) 2-1. A solenoid has 500 turns per meter length and radius of 5 cm. When the current in the solenoid is 8 A, what is the magnetic flux though the cross-sectional area of the solenoid? (B) 6.03 x 104 T m2 (D) 3.95 x 105 T m2 (A) 5.03 x 103 Tm2 (C) 1.58 x 103 Tm2 2-2: In an RLC circuit, resistor is R-0.7 Ω, capacitor is C 0.04 F, the inductor is L 0.5 H, at an instant where the instantaneous current in the circuit is 1 4 A, what is the energy stored in the magnetic field of the inductor? (B) 2] (D) 4] (A) 0.838I (C) 7.07J 2-3: In an RLC circuit, resistor is R 0.7 2, capacitor is C 0.5 H, what is the resonance frequency of this circuit? 0.04 F, the inductor is L (B) 0.838 rad/s (D) 0.714 rad/s (A) 0.014 rad/s (C) 7.07 rad/s Problem 3. Filling the blank: (10+8 -18 pts) Include units for all of your numerical answers. 3-1: In the circuit shown in the right diagram, the emf of the battery is 20 V, the resistor is 10 12, the inductor is 5 H. (a) The switch Si and Sz are initially open, at time R (に0s), the switch S1 is closed, the instantaneous current in the inductor at t Os is S. (b) At a later time t 1s, the current through L is S2 (c) At time t- 1s, the magnitude of potential difference across L is (d) After a long time, the current through L is

Answer 1

3.95%,0-5 ㎡ 내dhu L-3 neouD Cunn R. 2.11