What does electrical conductivity measure?
A
The resistance of a material
B
The ability of a substance to conduct electricity
C
The voltage across a circuit
D
The power consumed by a circuit
Analysis & Theory
Electrical conductivity is a measure of a material’s ability to allow the flow of electric current.
The SI unit of conductivity is:
B
Siemens per meter (S/m)
Analysis & Theory
Conductivity is measured in Siemens per meter (S/m).
Which of the following solutions has the highest electrical conductivity?
Analysis & Theory
Seawater contains a high concentration of ions, making it highly conductive.
What type of device is used to measure conductivity?
Analysis & Theory
A conductivity meter is used to measure the ability of a solution to conduct electricity.
Which of the following increases the conductivity of a solution?
D
Diluting with distilled water
Analysis & Theory
Salt dissociates into ions, which increases conductivity.
Which of the following materials is the best conductor of electricity?
Analysis & Theory
Copper is a metal with very high electrical conductivity.
What happens to conductivity when temperature increases (in most electrolytic solutions)?
Analysis & Theory
As temperature increases, ion mobility increases, thus increasing conductivity.
Which of the following is a poor conductor of electricity?
Analysis & Theory
Distilled water has very few ions, making it a poor conductor.
In a conductivity cell, the two electrodes are usually made of:
Analysis & Theory
Platinum electrodes are commonly used in conductivity measurements due to their inert nature.
Which factor does NOT affect conductivity of a solution?
Analysis & Theory
Color has no effect on conductivity; it depends on the presence and mobility of ions.