E hw

Research electromagnetism and Oersted's law.

A hw - somewhat late

Find out about:

Electromagnetism

Domain theory

Sorry for the delay in posting this.

Test answers

E HW

So, obviously something is up with this North/South business.  Well, what is it?  To recap:  the needle end of the compass pointed toward the South end of the magnet.

- What does this mean?

- What ramifications does it have for the Earth's magnetic field?

Other questions for research:

Where is "magnetic north" on Earth?

Magnetic south?

Yet more things to think about:

Must there always be at least one north pole with every south pole (and vice versa)?  Can magnetic monopoles exist?  This is not something you'd necessarily know, so feel free to research.

How are magnetic fields different from electric fields?

Test practice

1.  Consider three resistors:  2, 5, and 10 ohms.  They are in series with a 30-V battery.  Find total resistance, current and individual currents and voltages.

2.  Repeat the above problem if the resistors are in parallel with the battery.

3.  Resolve the combination circuit below:

4.  Charge review.  Consider a chunk of charge:  -15 C.  

A.  What kind of particles are these?

B.  How many of these particles are there

C.  If a 10 C charge is brought nearby, 0.1 m away, what is the force between the two chunks of charge?

D.  Draw the electric field between the charges.

Test heads-up

Test on circuits (and earlier charge stuff) is next Thursday and Friday, right before spring break.  Sorry for the final push - cant be helped.