A word about the final exam

I'm astonished and disappointed at the number of students who felt entitled to google the bonus question.  That is generally called cheating.  Typically, exams get disqualified for such an infraction.  

On the other hand, I truly appreciate the effort put in by those of you who attended class and studied.  All the best to you.

Good luck with everything.

Exam - don't forget

It's at 7:30 PM in our normal location.  I'll be here by 6:30, but we can't start until 7:30.

And as before, YOU ARE PERMITTED TO HAVE A NOTESHEET, front and back.

Good luck, and email me any questions you have (seanplally@gmail.com).

And thank you all for a great semester!  Best of luck to you!!

Sean Lally

Exam topics

Folks:

The topics for the final exam are:

interference of light and holography (first topic after test 2)
electrical charge
proton, neutron, electron, quark - particles
atomic number and elements
charging things - what happens
voltage
current
resistance
units of V, I and R
series circuit
parallel circuit
basics of circuits
bulb brightness predictions - it's related to current
V = I R
basic electrical schematics (and symbols)
magnetism
electromagnetism
electromagnetic induction
motors
engines (the very basics of a 2-stroke engine)
compasses
finding north
generators (vs. motors)

Magnetism questions for review

Magnetism

1. In general, what causes magnetism?

2. What is electromagnetism?

3. What is the peculiarity involving magnetic north?

4. How would you find true (geographic) north?

5. What is a motor and how does it basically work?  How does it differ from an engine?

6. What is electromagnetic induction?

7. What is a generator?

8. How do compasses respond to magnetic fields?

Motors are not engines.

Motors and engines are words that are often used interchangeably.  They are, in fact, two very different devices.  Yes, both rotate, but engines typically use gasoline/fuel, whereas motors are typically all electric.



http://www.animatedengines.com/

We talked briefly about the "4 stroke" engine


This depicts a "two stroke" engine, typically found in small gas-powered devices:  mopeds, chainsaws....


http://science.howstuffworks.com/transport/engines-equipment/two-stroke1.htm

http://science.howstuffworks.com/transport/engines-equipment/two-stroke2.htm

The more complicated case of the 4-stroke engine:

http://auto.howstuffworks.com/engine1.htm

http://auto.howstuffworks.com/engine2.htm

More info, FYI:

http://auto.howstuffworks.com/engine4.htm

Study group?

Several folks have expressed interest in a study group for the final exam.  If this is you, send me an email about this:  seanplally@gmail.com

I will then connect all of you together.

Thanks!

SL

Magnetism images