Fred,I know this ? will be off from OP but, how are you using an ohmmeter to check torque? Torque is a mechanical measurement.
Yes that's a good question and you are correct. But if the bus bars have loose connections or corrosion between the joints then it will show up as a high resistance reading since the ductor is so sensitive. This is a tried and true method of checking the integrity of a bolted connection, breaker contact condition, etc.
I suggest you do some research on the subject: