Answered: A soldering iron is rated at 50 watts…

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 soldering iron is rated at 50 watts when connected to a 250 V supply. If the soldering iron takes 5 minutes to heat to a working temperature of 190°C from 20°C, find its mass. assuming it to be made of copper. Given specific heat capacity of copper is 390 J/kg°C

Expert Solution

Step 1

We have an soldering iron having,

Power (P) = 50 W

Supply voltage (V) = 250 V

Time taken = 5 minutes = 5 * 60 = 300 Sec

Initial temperature (T₁) = 20 $°$ C

Working temperature (T₂) = 190 $°$ C

Specific heat capacity of copper (S) = 390 j/kg $°$ C

We have been asked to find the mass of this soldering iron.

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