question form

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PHY 242

Your 'question form' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

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Question_Cap_Value_in_Kit

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I have misplaced the capacitor that comes in the kit.

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Professor Smith,

I seem to have misplaced the capacitor that came in the set. I bought a backup from RadioShack to complete the Module 3 experiments. However, I am finding that the experiment is not going as it should and I think this is because of the cap value (1000 uF). What value is the cap that comes in the set? I figure the longer the time constant the better to make the bulb light, so I will go with this thinking to buy a couple new caps that hopefully work in the experiment so I can get everything done by the Monday deadline.

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I assume you rented the capacitor and generator from the bookstore.

In any case you need a 1-Farad capacitor, and you should only use the capacitor that comes with that package. A 1-Farad electrolytic capacitor can be very dangerous. It would also have the potential to melt your circuits.

You can order a 1-Farad capacitor from Arbor Scientific or another vendor (I think I've seen them on Amazon). The Arbor link is

http://www.arborsci.com/1-farad-capacitor

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If you need an extra week, which is what it might take you to get the capcitor, I'll allow that.

The Arbor price, indicentally, is $25.

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