- #1
JoeN
- 13
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I'm doing coursework on a circuit experiment we performed in class. I'm pretty sure the results are wrong or flawed, but we were testing the effect of increasing the length of wire on the resistance. I had a voltmeter about the wire, a cell, an ammeter, and completed the circuit by attaching the croc. clips to the wire...
Of course, the resistance should increase and the current decrease, but should the voltage increase, as it did in my experiment? And should it increase enough to also make the current increase despite the higher resistance? I know that more work is needed to push the charge through the wire if you increase its length, so in theory the wire's potential difference should increase (?) but I'm not so sure the current should increase... This didn't occur in the preliminary data I carried out either.
I'm not sure about the voltage of the cell. Well, I know it was 1.5V but it had been used enough to make that irrelevant.
Oops, wrong forum. Sorry about that
Of course, the resistance should increase and the current decrease, but should the voltage increase, as it did in my experiment? And should it increase enough to also make the current increase despite the higher resistance? I know that more work is needed to push the charge through the wire if you increase its length, so in theory the wire's potential difference should increase (?) but I'm not so sure the current should increase... This didn't occur in the preliminary data I carried out either.
I'm not sure about the voltage of the cell. Well, I know it was 1.5V but it had been used enough to make that irrelevant.
Oops, wrong forum. Sorry about that