Saturday, January 31, 2009
Friday, January 30, 2009
home work 2
Continue Questions 7 - 11
Conmbine F=BIlsin(theta) and t =Fxr to work out the torque on a motor loop.
Todays classwork has been scan, it will be marked and publish as book.
A good video of electron beam deflection warning, doing this will wreck you TV
A few good pictures of deflect ebeam
Conmbine F=BIlsin(theta) and t =Fxr to work out the torque on a motor loop.
Todays classwork has been scan, it will be marked and publish as book.
A good video of electron beam deflection warning, doing this will wreck you TV
A few good pictures of deflect ebeam
Thursday, January 29, 2009
Lesson 2
More Revision: Solenoid - coils of wire. How do you find the pole? What increases the strength of the field?
Motor Effect - Page 113
From Right hand slap rule- size of Force is due to magnetic field, Length of conductor, orientation of conductor, current
Motor Effect - Page 113
From Right hand slap rule- size of Force is due to magnetic field, Length of conductor, orientation of conductor, current
- F Force N newtons
- B Magnetic Field Strenght T teslas
- l Length m meters
- I Current A amps
- Sin (Theta) (zero if conductor points along the field)
F=BIlsin (Theta)
Next you will learn Torque or turning force about an axis. Torque in an electric motor. Monday will be a demonstration of a magnetic field right hand slapping electrons.
for a good summary for advanced students go to Phet
Wednesday, January 28, 2009
Thursday, January 22, 2009
First Lesson - Review Magnetism
This is the first lesson back.
- Demostration of current force
-Review of formulae
- Demostration of current force
-Review of formulae
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About Me
- drhill
- I come from a Science family: My father Geoffrey Hill was Australia's first computer programmer on CSIRAC the fourth computer in the world. He is credited with invention of Computer music and the development of “Interprogram” a language before Basic. My PhD is in Atomic and Molecular Physics. I have researched the activated oxygen layer above the ozone layer, and 'Assigned' the world's smallest molecule. At the University of Toronto I researched high power UV lasers. I have specialized in automation in fibre optics. This developed into research in Machine Intellect and Robots. I have enjoyed work as an Explainer with Questacon and my time as a part-time soldier. I currently teach High School Science at Epping Boys’ High.