Magnetic Fields & Electric Potential

Hi guys.. I didn't know I was the next scribe. :) Anyway, here's what we did in today's class:

• Ms. K handed back the homework from p. 423 (#17) on the green booklet about Electric Fields that was worth 5 marks.

• We corrected the Concept-Development Practice Page 33-2 - Chapter 33: Electric Fields and Potential. It's the double sided sheet with drawings on it.

Electric Potential:

1. KE=decrease in PE
2. force, distance, W=Fd, increases, equal
3. Potential, Voltage
4. 1 V
5. 12 J
6. 5000 V
7. 5000 V
8. 5000 V
9. 0.005 J
10. charge
    

Oh yeah, please highlight this part on the front page of the sheet right after question #2: At any point, a greater quantity of test charge means a greater amount of PE, but not a greater amount of PE per quantity of charge. The quantities PE (measured in joules) and PE/charge (measured in volts) are different concepts. I believe this is an important information about this unit that most students get confused of. :)

• After this, we also did the Electric Potential work sheet from yesterday's class and put the answers on the white board after we were given some time to do it. So here you go:

1. 31 J/C
2. a) 3.6x10^-14 J b) 180 V
3. 12 741 119.27 m/s
4. 3.24x10^-9 J
5. a) 12eV or 1.92x10^-18 J b) 12eV or 1.92x10^-18 J c) 2.05x10^6 m/s

• Then lastly, we got a booklet that has Potential Energy and Kinetic Energy Between Two Charged Plates: Review written at the front and has 4 pages. And another sheet called Physics 40S Electric and Magnetic Fields Assignment - The Physics of a Cathode Ray Tube that may be for hand in tomorrow in class.

** Make sure you've handed in your lab that we did the other day and questions 4&5 on Electric Fields Strength. **

Reminder: Our unit test is on May 19, Wednesday.

Next scribe is Roger