Materials Science and Engineering: An Introduction

Published by Wiley
ISBN 10: 1118324579
ISBN 13: 978-1-11832-457-8

Chapter 20 - Magnetic Properties - Questions and Problems - Page 836: 20.21a


The B value is about 1.07 tesla

Work Step by Step

Given: Bar of iron-silicon alloy within a coil of wire that is 0.40 m long, having 50 turns with a current of 0.1 A. Required: B field within the bar Solution: Using Equation 20.1: $H = \frac{NI}{l} = \frac{(50 turns)(0.1 A)}{0.40 m} = 12.5 A/m$ From the given Figure 20.29, the B value is about 1.07 tesla.
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