First, let us see what a Magnet is

 

What is a Magnet

It is an object which attracts other objects like iron, steel etc

Example

  • If we bring a piece of iron near a magnet, it gets attracted towards the magnet
  • If we brings 2 magnets together, they also attract each other

 

What is a bar magnet?

A bar magnet is a rectangular magnet

It is a permanent magnet 

It has two poles - North Pole and South Pole

How does Bar Magnet look like.jpg

 

Properties of Bar Magnet

Since bar magnet is a permanent magnet, it will have the same properties as that of permanent magnet

It's properties are

  • It has two poles - North Pole and South Pole
  • It attracts iron and steel particles
  • Like poles repel each other, unlike poles attract each other
    Opposite Poles Attract and Similar Repel.png
  • When freely suspended, north pole of magnet points towards north pole of the earth
    North Pole of Magnet points towards North - Teachoo.jpg
  • They are permanent magnets - they do not lose their magnetism
  • Magnetic field is maximum at the poles, and minimum as we go towards the center

 

Magnetic Field Lines in a Bar Magnet

If we sprinkle iron filings on the bar magnet, they would arrange in this form

Magnetic Field Lines Around a Bar Magnet - Teachoo.jpg

This arrangement of iron filings is actually magnetic field lines

Which we we will study in the next post - Magnetic Field Lines 

 

Uses of a Bar Magnet

Since bar magnet is a permanent magnet, it will have the same uses as that of permanent magnet

It's uses are

  • Magnets are used in Compass
  • Bar magnets are used in Fridge Magnets.
  • They are used to scan the body, like in MRI (Magnetic Resonance Imaging)

 

Alnico and Neodymium Bar Magnet

 

Actually, Bar Magnet is usually of two types

  • Alnico Bar Magnet -  Made up of aluminium, nickel, cobalt, and iron
  • Neodymium Bar Magnet -  Made up of neodymium, boron, and iron

 

Questions

Q1 Page 224 - Why does a compass needle get deflected when brought near a bar magnet?

View Answer

 

Q1 Page 228 - Draw magnetic field lines around a bar magnet.

View Answer

 

 

Q2 Page 228 - List the properties of magnetic field lines.

View Answer

 

 

Q3 Page 228 - Why don’t two magnetic field lines intersect each other?

View Answer

 

 

 

  1. Class 10
  2. Chapter 13 Class 10 - Magnetic Effects of Electric Current

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.