4. Consider the RC circuit shown at right. a) If S1 is held closed for 10 s before it is re-opened, determine the charge on the capacitor after this time. b) After S1 is released, supposed S2 is closed. Given that the voltage drop across the LED is 1.5 V, how long will it be before the LED turns off assuming it requires a minimum of 5mA to remain lit?

4. Consider the RC circuit shown at right. a) If S1 is held closed for 10 s before it is re-opened, determine the charge on the capacitor after this time. b) After S1 is released, supposed S2 is closed. Given that the voltage drop across the LED is 1.5 V, how long will it be before the LED turns off assuming it requires a minimum of 5mA to remain lit?

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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