Homework Help: Voltage - Quick Question

1. May 22, 2007

husky88

1. The problem statement, all variables and given/known data
What is wrong with this statement: A charged rod has a voltage of 0.50 A through it. Explain your answer.

2. Relevant equations

3. The attempt at a solution
A charged rod cannot have a voltage through it and voltage is not measured in A. Right? I know that to have a voltage, there must be a potential difference determined by two different charges. But what if the rod was a magnet? Would there be a voltage through a magnet?

2. May 22, 2007

Maxwell

You're right, voltage is not measured in Amps. Current is. Is this supposed to be a trick question, or is it just to see if you are paying attention?

3. May 22, 2007

husky88

I don't know (?). Is it a trick question?

4. May 23, 2007

ijustlost

I think the only problem with the statement is the Amps bit. You're right that for there to be a potential difference you need a difference in charge, but if all the charge in the rod were at one end it could have a potential difference across it.

Magnetic "voltage" is different to electric voltage. You're right that a bar magnet would, in a sense, have a magnetic potential across it as it has two poles.

5. May 23, 2007

husky88

Thank you. That clarifies my understand of voltage, finally.

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