Check Your Understanding (a) If the current in the circuit of in Figure 14.12(b) increases to 90% ofits final value after 5.0 s, what is the inductive time constant? (b) If R= 20 2, what is the value of the self-14.8inductance? (c) If the 20-2 resistor is replaced with a 100-2 resister, what is the time taken for the current toreach 90% of its final value?14 9Check Your Understanding For the circuit of in Figure 14.12(b), show that when steady state is Chapter 14 | Inductan| is opened and S, is closed, the circuit becomes a single-loop circuit with only a resistor and an inductor (Figur1.12(c)).R.|(t).Figure 14.12 (a) An RL circuit with switches S, and S2.(b) The equivalent circuit with S closed and S, open. (c) Theequivalent circuit after S is opened and S, is closed.first consider the RL circuit of Figure 14.12(b). Ônce S, is closed and S2 is open, the source of emf producesrent in the circuit. If there were no self-inductance in the circuit, the current would rise immediately to a steady value/R. However, from Faraday's law, the increasing current produces an emf V, = -L(dI/dt) across the inductor.

In the RL circuit the expression for I(t) is given by: I(t)=Io1-e-tτ....1where,Io=steady state value…

Check Your Understanding (a) If the current in the circuit of in Figure 14.12(b) increases to 90% of its final value after 5.0 s, what is the inductive time constant? (b) If R = 20 2, what is the value of the self- 14.8 inductance? (c) If the 20-2 resistor is replaced with a 100-2 resister, what is the time taken for the current to reach 90% of its final value?

Check Your Understanding (a) If the current in the circuit of in Figure 14.12(b) increases to 90% of its final value after 5.0 s, what is the inductive time constant? (b) If R = 20 2, what is the value of the self- 14.8 inductance? (c) If the 20-2 resistor is replaced with a 100-2 resister, what is the time taken for the current to reach 90% of its final value?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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