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By mrmackenzie, January 21, 2009 8:39 pm

Here is your next homework exercise. You must hand this in no later than Thursday 29th January if you want to have it corrected and receive feedback before the Physics prelim on Monday 2nd February. The questions are on AC electricity and charging/discharging of capacitors.

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By mrmackenzie, January 21, 2009 6:17 pm

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?

YouTube Direct Link

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By mrmackenzie, January 18, 2009 4:53 pm

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.

www.virtual-oscilloscope.com

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By mrmackenzie, January 7, 2009 4:43 pm

Your HW sheet with questions on EMF and the Wheatstone Bridge is attached.  Please hand it in no later than the above date.

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