charging & discharging capacitors

We looked at factors affecting the shape of the charging & discharging curves of capacitors today. Here is a video I found on youtube that covers some of the areas we discussed. Ignore the maths bit at the end, we won’t need that. Notice how the man in the film uses a lightbulb as a way of showing when the current is large or small, clever, eh?

using an oscilloscope

Although we’ve completed the ac section of unit 2, some of you might want to get some practice at using an oscilloscope to determine the frequency & peak voltage of a signal.

Use the link below to try using the virtual oscilloscope I had on the SMARTBoard.  You can view different signals by connecting different coloured leads to the inputs.

deriving the equations of motion

I’ve been looking through the results of the traffic light survey we did at the end of unit 1 of the higher course.  The learning outcome that most people were unhappy about was the derivation of the equations of motion.

I put together a handout that outlines where the 3 equations come from, starting with a simple velocity-time graph.  Let me know if you think your understanding of this outcome would benefit from the video treatment I have used in your homework solutions.