>   I = U/R has no "maximum".

As an abstract equation, no.

In a real system, if you decrease R far enough, eventually U starts to 
decrease too, in each a way that I remains fixed. Thus I has a "maximum 
value".

Put simply, there is a limit to how fast the system can replace the 
charge you're neutralising. It's no different than the fact that a water 
pump has a maximum flow rate, no matter how slight the resistence of the 
water pipes becomes.

Post a reply to this message