Magnetic Force
Chapter Name : Moving Charges And Magnetism |
Sub Topic Code : 101_12_04_02_03 |
Topic Name : Magnetic Force |
|
Sub Topic Name : Magnetic Force On A Current-Carrying Conductor |
|
Introduction
We will learn about the magnetic force exerted by a current carrying conductor.
Pre-Requisites:
about magnetic field and Lorentz force
Activity:
Place a bar magnet on a paper and draw its field lines.
Real Life Question:
Why there is deflection in the magnetic needle when brought near to the current carrying coil?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Drift velocity | Average velocity of the charge carriers in any current carrying wire. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Magnetic needle | Bring the galvanometer near the current carrying wire and see the deflection in the magnetic needle. |
Real life uses :
In many measuring instruments this quality is used to detect the current or to measure the current.
Places to visit :
Your school physics lab, where you can see the current carrying coil deflecting the magnetic needle.
Practical examples around us
| Examples | Explainations |
|---|---|
| Every wire around us | Every current carrying wire around us exerts a magnetic force in the surroundings. |
What you learn in Theory:
Every current carrying conductor exerts a magnetic force in its surroundings, which can be evaluated by use of Lorentz law.
What you learn in Practice:
This quality of current carrying wire can be used to detect current or measure current in many instruments.