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"Dr. Slick" wrote:
Ohms are still always Ohms, regardless of what you are measuring. And it's very interesting that the E and H fields have units of Volts/meter and Ampere(turn)/meter, which when you divide one by the other, you get basically Volts/ampere, just like you would in a transmission line. How do you know when the reduced units of one computation mean the same thing as another? An example: The reduced units of modulus of elasticity (in/in/psi - psi) is the same as the units for stress (psi) and yet modulus of elasticity is clearly not stress. And in this case, the unreduced units are much more descriptive than the reduced units. Reducing discards information. On the other hand, Torque (Newton*metres) when multiplied by Radians (metre/metre) does give Energy (N*m*m/m - N*m), but only after reduction. And for sure, Torque (N*m) is not the same as Energy (N*m). So sometimes it is appropriate to say the reduced results are the same and some times it is not. Is there a way to know when it is legal? What rules have you used to conclude that reducing V/m/A/m to V/A is appropriate? ....Keith |
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