Look back at the diagram of the relay shown in the figure below. Why is the coil fitted with a soft iron core?

Soft iron acts as a magnetic core for the electromagnet in the case of an electric relay. This core creates a stronger and denser magnetic field of lines and works as a temporary magnet when current passes through it.

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Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 20 - Electromagnetic Forces>Questions

David Sang Solutions for Chapter: Electromagnetic Forces, Exercise 1: Questions

Author:David Sang

David Sang Physics Solutions for Exercise - David Sang Solutions for Chapter: Electromagnetic Forces, Exercise 1: Questions

Attempt the practice questions on Chapter 20: Electromagnetic Forces, Exercise 1: Questions with hints and solutions to strengthen your understanding. Cambridge IGCSE® Physics Coursebook Second Edition solutions are prepared by Experienced Embibe Experts.

Questions from David Sang Solutions for Chapter: Electromagnetic Forces, Exercise 1: Questions with Hints & Solutions

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Upper Secondary: IGCSE

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Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 20 - Electromagnetic Forces>Questions>Q 20.1

A current flows downward in a wire that passes vertically through a small hole in a table-top. Will the magnetic field lines around it go as seen from above?