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Old 02-05-2010, 04:47 AM
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Default Basic electricity question

I hope someone can clear this up for me. In a parallel circuit, the total resistance is less than any one resistor. I know the equations but I just can't understand the concept. Can anyone help me grasp this?
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Old 02-06-2010, 11:40 AM
BaconPie BaconPie is offline
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Default Re: Basic electricity question

The current is shared between both paths meaning that the whole current isn't going through one resistor. Say we have a 100ohm resistor connected to a voltage source. Then we add a 10ohm resistor in parallel. Most of the current that was going through the 100Kohm is now going through the 10ohm (because there is less resistance) however some of it also still goes through the 100ohm. Therefore the overall resistance is lower than the smaller one.

(100^-1 + 10^-1)^-1 = 9.09ohms

Most of it goes through the 10ohm but some of it still trickles through the 100ohm.
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Old 02-06-2010, 12:04 PM
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Default Re: Basic electricity question

If you lump it the lowest current becomes the overall current.
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Old 02-06-2010, 09:52 PM
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Default Re: Basic electricity question

The answer will become clear when you piss on a live uninsulated wire.
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Old 02-06-2010, 09:59 PM
Femme Fatale Femme Fatale is offline
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Default Re: Basic electricity question

Quote:
Originally Posted by Slartibartfast View Post
The answer will become clear when you piss on a live uninsulated wire.


His question has already been answered, sort of overkill now.
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