Current and resistance

what do you think should be the minimum resistance in a circuit?? I am very curious to that please tell me!!!

#Physics

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Comments

If you have a really short wire, the resistance will be close to $0 \ \Omega$ .

Also, superconductors have zero DC resistance.

Jimmy Kariznov - 7 years, 10 months ago

this means that wire would then have infinite current, how is that possible..

Neeraj Kadian - 7 years, 10 months ago

So, let's say we take a battery and short it out with a wire. The resistance of the wire plus the internal resistance of the battery is very tiny (but still positive). So, the current is just really large (but still finite).

I don't know much about superconductors, but that Wikipedia article says that when running a current through it, the voltage is the same at both ends. Hence, the resistance is 0.

Jimmy Kariznov - 7 years, 10 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$