MultiMeter Help!

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So Vr=0, then no current, no voltage...

But what about Vs and Vo, solve for

Vs=IR

And

Vo=IR

???

 

Excellent info.

+Karma

 

Vs is an arbitrary source voltage such as 120 VAC or 12 VDC, and Vo is an open circuit voltage to which there is no associated resistance therefore Ohm's Law is not applicable.

Ohm's Law is indeed a powerful tool but it is not the be-all end-all of circuit analysis which I attempted to portray with the capacitor circuit to which Ohm's Law does not apply.

 

Ok, I will concede that you have proven your side. Thanks for the explanation and lesson on voltage theory.

I assume we both still agree that you cannot have current without voltage?

And for practicalities sake, there is no need to measure current (amperes) in tank water or equipment. The only case you may want to measure current is to determine how many watts your equipment is using when running, but that's a different thread.

The whole reason for my explanations have to do with ground probes and the need for a 'system ground'. It is a very good idea to ground your tank water to eliminate the potential risk for electric shock to you or your tanks inhabitants. Creating a system ground in your tank is like having a system ground in an electrical circuit. In fact, I like to think of the tank and all of the equipment connected to it as a 'circuit'. When you understand that ground planes exist in circuits for a reason, you will understand why it is a reasonable idea to ground your tank water.

 

These are all very good points to be taken from this badly sidetracked thread;D

 

Well, actually...



...just kidding!;D