Energy Consideration: A Quantitative Study
Chapter Name : Electromagnetic Induction |
Sub Topic Code : 101_12_06_07_01 |
Topic Name : Energy Consideration: A Quantitative Study |
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Sub Topic Name : Energy Consideration: A Quantitative Study |
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Introduction
When a conductor is
moved in a magnetic field mechanical work has to be done against the magnetic
field. This mechanical work is converted to electrical energy in the form of
induced EMF and finally the electrical energy is converted to thermal energy.
Pre-Requisites:
Electromagnetic
Induction, Motional Electromotive Force, Lenz’s Law, Law of Conservation of
Energy
Activity:
Motional
Electromotive Force
Real Life Question:
How to prove
mathematically that Lenz’s Law follows the law of conservation of energy?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Law of Conservation of Energy | Energy can neither be created nor be destroyed. It can be only changed from one form to another |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Conservation of Energy chart | To know about Conservation of Energy |
Real life uses :
Understanding how energy changes its forms
Places to visit :
Physics lab
Practical examples around us
| Examples | Explainations |
|---|---|
| Motional Electromotive Force | Its effect in the physical world |
What you learn in Theory:
That Lenz’s Law
abides by the law of conservation of energy
What you learn in Practice:
That the mechanical
work done to move the conductor is converted into electrical energy and finally
the energy is dissipated in the form of heat from the resistor. No energy is
lost or gained in the process.