Physics Class May 27, 2009

GREETINGS FELLOW PHYSICISTS.
On May 27th we continued our work on electric circuits.

We went over the following:

• Resistivity Problems.
• Chapter 25 Study Guide.
• Electric Circuit Problems.

We received the following:

• Cross-Word Puzzle.
• Notes on Electromagnetic Induction.

Here is a summary of the notes:

Induced current

A current set up in a closed circuit located in a magnetic field whenever the total magnetic flux linking the circuit is changing.

Necessary conditions for an electric current to be produced with a magnetic field

1) must have a closed circuit
2) must have a changing magnetic flux

Factors that determine the value of the induced EMF

1) length of the wire
2) flux density of the field
3) speed at which conductor moves though the field

EMF = Blv

• Some of us also rewrote the test on Electric and Magnetic Fields.

Thank you Ms. Kozoriz for uploading the worksheets.

~Katherine~