Non-Contact Forces-Magnetic Forces
Chapter Name : Force And Pressure |
Sub Topic Code : 101_08_11_07_01 |
Topic Name : Non-Contact Forces-Magnetic Forces |
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Sub Topic Name : Non-Contact Force |
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Introduction
Magnets – Repulsion & Attraction
Pre-Requisites:
Introduction to Forces
Activity:
You will need two bar magnets; What happens when you put, two north poles towards each other, two south poles towards each other, one north & one south pole towards each other. There might be attraction or repulsion.
Real Life Question:
How can magnet attract pieces of iron?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Non-Contact Forces | Repulsive and attractive forces exerted by magnets without touching the object |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| 2 bar magnets | See how the 2 end of magnets attract and/or repel when one end is changed |
Real life uses :
Collecting metals (magnetic) from garbage dumps, Compass, toys, door bell
Places to visit :
Local Science Museum – Magners Exhibit
Practical examples around us
| Examples | Explainations |
|---|---|
| maglev trains | They use magnetic levitation to suspend, guide and propel |
What you learn in Theory:
Magnets exert a pull on the iron objects ( and few other metals). This force does not need a contact between the object and magnet. 2 magnets attract if opposite poles are facing each other and repel if like poles are facing each other
What you learn in Practice:
The practical applications of this force in waste segregation, toys, door bell etc.