Multiple ChoiceConsider the LR circuit shown below. Initially, both switches are open. Switch 1 is closed. a) What is the maximum current in the circuit after a long time? Then, S1 is opened and S2 is closed. b) What is the current in the circuit after 0.05s?401views2rank3comments
Multiple ChoiceAn LR circuit with L = 0.1 H and R = 10 Ω are connected to a battery with the circuit initially broken. When the circuit is closed, how much time passes until the current reaches half of its maximum value?447views4comments
Textbook QuestionA 50 cm solenoid with 1000 turns has an inductance of 20 mH. b. Flipping a switch disconnects the inductor from the battery and connects it to a resistor. What is the value of the resistance if the magnetic field decreases by 50% in 150 μs?107views
Textbook QuestionAt t=0 s, the current in the circuit in FIGURE EX30.35 is I0. At what time in μs is the current 1/ 2 I₀?119views
Textbook Question(II) It takes 2.85 ms for the current in an LR circuit to increase from zero to 0.75 its maximum value. Determine (a) the time constant of the circuit, (b) the resistance of the circuit if L = 31.0 mH.24views
Textbook Question(III) Two tightly wound solenoids have the same length and circular cross-sectional area. But solenoid 1 uses wire that is 1.5 times as thick as solenoid 2. (a) What is the ratio of their inductances? (b) What is the ratio of their inductive time constants? (Assume the only resistance in the circuits is that of the wire itself.)30views
Textbook Question(II) (a) Determine the energy stored in the inductor L as a function of time for the LR circuit of Fig. 30–6a. (b) After how many time constants does the stored energy reach 99.9% of its maximum value?<IMAGE>
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