Electromagnetism Part 2

1. Magnetic Field Around A Wire ,[object Object],[object Object]

2. Magnetic Field Inside a Solenoid ,[object Object],[object Object],Recall x = field ‘into page’ and a dot = ‘out of page’

“ The Trick” ,[object Object],[object Object],[object Object],[object Object],http://www.waowen.screaming.net/Maghandrules.htm

Solenoid / Permanent Magnet comparison ,[object Object],http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/imgmag/barsol.gif

Therefore ,[object Object],[object Object],N S + -

- + N S - http://www.pschweigerphysics.com/images/rhr2.jpg

Magnetic Force on a Current ,[object Object],[object Object],[object Object],[object Object],[object Object],http://www.bbc.co.uk/scotland/education/bitesize/standard/img/physics/electricity/movement/motor.gif

Right Hand Slap Rule ,[object Object],[object Object],[object Object],[object Object],Force Current (+-> -) Current http://commons.wikimedia.org/wiki/File:Right-hand-rule.jpg

Another One The current is parallel to the magnetic field, so no force results.

The DC Motor ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The DC Motor http://www.walter-fendt.de/ph11e/electricmotor.htm http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=912.0

Electromagnetic Induction ,[object Object],[object Object],[object Object]

Right Hand Rule ,[object Object],[object Object],[object Object],[object Object]

Electromagnetic Induction Example Conductor (normally wire) v The “positive charges” move up and the negative charges move down. This generates a voltage difference across the wire. + -

Electromagnetic Induction Example Calculate the current in the circuit. The “positive charges” moved anticlockwise in the animation. 10 Ω + + + + +

Motor Effect and Electromagnetic Induction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cause Effect Always Magnetic Field http://commons.wikimedia.org/wiki/File:Right-hand-rule.jpg

Generators and Alternators ,[object Object],[object Object]

Japan’s Electricity ,[object Object],[object Object],[object Object],[object Object],[object Object]

Transformers ,[object Object],[object Object],[object Object],[object Object]

Transformer Diagram ,[object Object],http://commons.wikimedia.org/wiki/File:750px-Transformator.png

Transformer Equation ,[object Object]

Electromagnetism Part 2

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Electromagnetism Part 2