a) Sydney tap-water has a fluid electrical conductivity (EC or σ) of approximately 210μS/cm. Express this in terms of Ohm metres (resistivity) and mS/m (conductivity). b) The fluid electrical conductivity (EC) was measured on a water sample first at 25 °C to 305 μS/cm, then later at 20 °C to 272 μS/cm. Assuming a linear relationship, calculate the EC at 10 and 30 °C. c) A 20 cm long cylinder with 10 cm diameter is filled with an undisturbed fully saturated sandstone core. A current (I) of 100 mA was passed through the cylinder and a voltage(V) of 10,700 V was measured. Calculate the resistance and the resistivity of the sample. d) If we further know that the porosity is 1%, can you estimate the fluid electrical conductivity?
a) Sydney tap-water has a fluid electrical conductivity (EC or σ) of approximately 210μS/cm. Express this in terms of Ohm metres (resistivity) and mS/m (conductivity). b) The fluid electrical conductivity (EC) was measured on a water sample first at 25 °C to 305 μS/cm, then later at 20 °C to 272 μS/cm. Assuming a linear relationship, calculate the EC at 10 and 30 °C. c) A 20 cm long cylinder with 10 cm diameter is filled with an undisturbed fully saturated sandstone core. A current (I) of 100 mA was passed through the cylinder and a voltage(V) of 10,700 V was measured. Calculate the resistance and the resistivity of the sample. d) If we further know that the porosity is 1%, can you estimate the fluid electrical conductivity?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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a) Sydney tap-water has a fluid electrical conductivity (EC or σ) of approximately 210μS/cm. Express this in terms of Ohm metres (resistivity) and mS/m (conductivity).
b) The fluid electrical conductivity (EC) was measured on a water sample first at 25 °C to 305 μS/cm, then later at 20 °C to 272 μS/cm. Assuming a linear relationship, calculate the EC at 10 and 30 °C.
c) A 20 cm long cylinder with 10 cm diameter is filled with an undisturbed fully saturated sandstone core. A current (I) of 100 mA was passed through the cylinder and a voltage(V) of 10,700 V was measured. Calculate the resistance and the resistivity of the sample.
d) If we further know that the porosity is 1%, can you estimate the fluid electrical conductivity?
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