What does one ohm signify?
One ohm (1 Ω) is the SI unit of electrical resistance, and it signifies the resistance of a conductor when a potential difference of 1 volt produces a current of 1 ampere through it.
Mathematical definition (from Ohm’s Law):
1 Ω = 1 V / 1 A
This means:
If 1 volt of voltage is applied across a conductor and it allows 1 ampere of current to flow, then its resistance is 1 ohm.
Conceptual understanding:
Practical example:
A wire with resistance of 1 ohm will allow 1 ampere current to flow when connected to a 1-volt source.
In simple terms:
One ohm represents the resistance level at which 1 volt pushes 1 ampere of current through a conductor.