Resistance in Ohms= potential difference divided by current Amps
electric current flows when electrons move through conductor, such as a metal wire. The moving electrons collide with ions in metal.
This makes it more difficult for current to flow, and causes resistance.
Is resistance in a conductor always the same?
No, because the resistance in a bulb is different
Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.
A law relating the voltage difference between two points, the electric current flowing between them, and the resistance of the path of the current.
Mathematically, the law states that V = IR, where V is the voltage difference, I is the current in amperes, and R is the resistance in ohms
Does Ohm's law apply to all conductors?
It applies to both metal conductors and circuit components (resistors) specifically made for this behavior.
There are, however, components of electrical circuits which do not obey Ohm's law
