Physical Science built electromagnets today and researched how the number of windings influenced the strength of the magnetic field. As we discussed in class, the magnetic field generated in a current-carrying wire is fairy feeble, but coil the wire into loops and the magnetic field of each loop adds to the field of its neighbors and the result can be quite significant. Add an iron core and a true electromagnet (as opposed to a solenoid) is born. I was puzzled, though, by how many groups had difficulty wiring the circuit. After an entire unit on electricity and circuits, I had not expected to find groups with wire ends flapping in the breeze, creating open circuits. Also, remember that lab directions are there for a reason - read them and follow them. Tomorrow, that will be of great importance as you build your electric motors. Make sure to read the instructions tonight to familiarize yourself with the pieces and assembly directions. Take time to read over the troubleshooting section and the synopsis of motor theory.
Physics and
Honors Physics tied up all loose ends for the electricity exam tomorrow. As usual, I'll be haunting my classroom before school if you have any questions. Do take time to peruse the sample final exams that I handed out today and don't forget to take home your copy of the final exam formula sheet.
Physics - you're on deck Tuesday;
Honors Physics is on the chopping block on Thursday. The sample finals are good examples of what to expect in terms of exam length, scope and question organization.
Honors Physics will have ample time to discuss any problems with me before their exam, but
Physics is short on time. Email me over the weekend if you have any issues and I'll respond as soon as possible. Just remember, this situation is unlikely to occur:
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