Re: Zero Ohms = Mathematically Incorrect
- From: John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 17 Aug 2006 16:58:31 -0700
On 16 Aug 2006 20:42:28 -0700, "Bill Bowden" <wrongaddress@xxxxxxx>
wrote:
Radium wrote:
Hi:
If a conductor has zero resistance, then what is the amperage of a
current flowing though it?
Amperage = voltage/resistance
If the resistance is zero, then the amperage is something that math
cannot explain. Anything divided by zero is an "error" when calculated.
How to solve this puzzle?
Thanks,
Radium
Yes, but E=IR, so if you have no resistance (R) then the voltage (E) =
zero and the current (I) is undefined since I=E/R and if E and R are
both zero, the current (I) can be a very large number, since 0/0 =
infinity. So what is the current in that case?
No, 0/0 is indeterminate. All that means is that, in a superconductive
circuit, you can't make a voltage measurement that tells you anything
about the current that's flowing. But the current is whatever it is,
and can be measured by other means, like magnetically for instance.
John
.
- References:
- Zero Ohms = Mathematically Incorrect
- From: Radium
- Re: Zero Ohms = Mathematically Incorrect
- From: Bill Bowden
- Zero Ohms = Mathematically Incorrect
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