Does Ohm's Law state that current equals voltage difference divided by the resistance?

Answer 1

Yes. More concisely, Ohm's Law states that current is voltage divided by resistance. Well, more commonly, it states that voltage is current times resistance, but simple algebra will let you solve for any of the three terms, the third being resistance is voltage divided by current.

Answer

Most definitely not.

Ohm's Law is probably the most misunderstood of all the electrical 'laws'.

Ohm's Law states that 'the current passing along a conductor is directly-proportional to the voltage across the ends of that conductor, providing physical conditions such as temperature remain constant'.

No mention of resistance; no mention of any equation.

For Ohm's Law to apply, 'the ratio of voltage to current must remain constant for variations in voltage'. Those materials for which Ohm's Law applies are called 'linear' or 'ohmic', and there are very few. Those materials and electrical components for which Ohm's Law doesn't apply are called 'non-linear' or 'non-ohmic', and include metals such as tungsten and components such as diodes. In fact MOST materials and devices do not obey Ohm's Law.

The equation, R = E/I, is actually derived from the definition of the ohm, and NOT Ohm's Law.

On a final note, there is no such thing as 'voltage' difference. 'Voltage' is another word for 'potential difference', so you cannot have a 'potential difference difference'!