Answered: A mobile phone battery has a capacity…

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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Question

A mobile phone battery has a capacity of 10 Ah. If the mobile phone requires 10 mW power to run smoothly, estimate how long will the phone run without charging? Assume the battery is fully charged.

Expert Solution

Step 1

If R ohm corresponds to the load of the mobile phone during smooth run and i(t) A is the corresponding current, then the power requirement by the mobile phone during smooth run can be expressed as

Step 2

In this present case, the power requirement for smooth run is given as

Step 3

Equating equation (1) and (2), the current required for smooth running of the mobile phone becomes

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