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I just need a clarification, I have been through a dozen www sites and cannot find an answer
they show how resistivity is worked out eg ...
the Ohm meter is usually shown with a "dot" between Ohm and metre
Is this the same as Ohm times metre ? or Ohms per metre or something else?
I would have thought that Ohms per metre would be Ohms/metre ?
cheers
Dave
they show how resistivity is worked out eg ...
E/J = ρ
As you already read, ρ is the symbol for resistivity. E is the electric field and has units of Volts per meter (V/m). J is the current density and has units of amps per meter squared (A/m2). The electric field is calculated by dividing the Voltage by the length, l, that voltage is applied.
E=V/l
The current density is calculated by the equation below
J=I/A
I is the current and is divided by the cross sectional area, A, over which the current flows.
the Ohm meter is usually shown with a "dot" between Ohm and metre
Is this the same as Ohm times metre ? or Ohms per metre or something else?
I would have thought that Ohms per metre would be Ohms/metre ?
cheers
Dave
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