Navras said:
…Resistivity is the measure of a material's ability to resist the flow of electric current. It is represented by the Greek letter rho (ρ) and is measured in ohm-meters (Ω·m).
Resistance is a measure of how much a material impedes the flow of electric current, while resistivity is an intrinsic property of the material itself. Resistance is dependent on the length and cross-sectional area of a material, while resistivity is not.
Conducting putty is a type of putty that contains conducting particles, such as graphite or carbon, which allow it to conduct electricity. It is often used in educational experiments and circuits.
The resistivity of conducting putty can be measured using a multimeter and a known voltage source. The putty is formed into a cylindrical shape and its resistance is measured using the multimeter. The resistivity can then be calculated using the formula: ρ = RA/l, where R is the measured resistance, A is the cross-sectional area, and l is the length of the putty.
The resistivity of conducting putty can be affected by several factors, including the type and amount of conducting particles present, the temperature, and the pressure applied to the putty. Additionally, the length and cross-sectional area of the putty can also impact its resistivity.