7Electromagnetic_induction_DC_generator_and_an_electric_engine_presentation
Оценка 4.6

7Electromagnetic_induction_DC_generator_and_an_electric_engine_presentation

Оценка 4.6
ppt
07.05.2020
7Electromagnetic_induction_DC_generator_and_an_electric_engine_presentation
7Electromagnetic_induction_DC_generator_and_an_electric_engine_presentation.ppt

Faraday's law and Lentz’s law-Application

Faraday's law and Lentz’s law-Application

Faraday's law and Lentz’s law-Application

Learning objectives -to explain the received results in a well-argued manner using

Learning objectives -to explain the received results in a well-argued manner using

Learning objectives

-to explain the received results in a well-argued manner using Faraday's law of induction and Lentz's law.
-apply Faraday’s and Lentz’s law in action

Electromagnetic Induction-Investigation

Electromagnetic Induction-Investigation

Electromagnetic Induction-Investigation

Faraday’s Law of Induction A changing magnetic flux induces an

Faraday’s Law of Induction A changing magnetic flux induces an

Faraday’s Law of Induction

A changing magnetic flux induces an EMF

Questions-Answers method Why current do induced in the circuit?

Questions-Answers method Why current do induced in the circuit?

Questions-Answers method

Why current do induced in the circuit?
How do you name this current?
How to determine the direction of induced current?
Why current is induces when only magnet is in action?

5

What is EMF? Looks like potential

What is EMF? Looks like potential

What is EMF?

Looks like potential. It’s a “driving force” for current

Faraday’s Law of Induction A changing magnetic flux induces an

Faraday’s Law of Induction A changing magnetic flux induces an

Faraday’s Law of Induction

A changing magnetic flux induces an EMF, a curling E field

Magnetic Flux Thru Wire Loop Analogous to

Magnetic Flux Thru Wire Loop Analogous to

Magnetic Flux Thru Wire Loop

Analogous to Electric Flux (Gauss’ Law)

(1) Uniform B

(2) Non-Uniform B

Minus Sign? Lenz’s Law Induced

Minus Sign? Lenz’s Law Induced

Minus Sign? Lenz’s Law

Induced EMF is in direction that opposes the change in flux that caused it

Faraday’s Law of Induction Changing magnetic flux induces an

Faraday’s Law of Induction Changing magnetic flux induces an

10

Faraday’s Law of Induction

Changing magnetic flux induces an EMF

Lenz: Induction opposes change

Ways to Induce EMF Quantities which can vary with time:

Ways to Induce EMF Quantities which can vary with time:

Ways to Induce EMF

Quantities which can vary with time:

Magnitude of B
Area A enclosed by the loop
Angle q between B and loop normal

Technology Many Applications of

Technology Many Applications of

12

Technology

Many Applications of Faraday’s Law

13 Metal Detector

13 Metal Detector

13

Metal Detector

14 Induction Stovetops

14 Induction Stovetops

14

Induction Stovetops

Ground Fault Interrupters (GFI)

Ground Fault Interrupters (GFI)

15

Ground Fault Interrupters (GFI)

16 Electric Guitar Pickups

16 Electric Guitar Pickups

16

Electric Guitar

Pickups

17 Electric Guitar

17 Electric Guitar

17

Electric Guitar

Скачать файл