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For a classroom demonstration, a professor built an RL circuit similar to the one shown in...

For a classroom demonstration, a professor built an RL circuit similar to the one shown in the figure, with e m f = 6.00 V, L = 5.80 mH, and R = 3.80 Ω.

A rectangular circuit contains a battery of emf ℰ on its left side, with the positive terminal above the negative terminal. An open switch S is on the top side, an inductor L is on the right side, and a resistor R is on the bottom side.

(a) What is the inductive time constant of the circuit (in ms)? _________________ms

(b) Calculate the current in the circuit (in A) 250 µs after the switch is closed. _________________A

(c) What is the value of the final steady-state current (in A)? A (d) After what time interval (in ms) does the current reach 80.0% of its maximum value? _____________ms

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