I would agree that "220 ohms" reads better in English than "220 ohm". But if you think about it, a 220 ¦¸ resistor is not 220 resistors each of one ohm all joined up in series.
So is it really a plural? How about when the number is less than one (i.e. 0.44 ¦¸) ?
The correct answer is "the resistance is 220 ohms", and "I have five 220 ohm resistors". Standard English grammar, think about what the plural refers to: lots of ohms in the first case and the number of resistors in the second.
Regards
Jeff
