Electrical Properties of Solids

Resistance in a wire depends on the length, as resistance builds up with length, the area, as a smaller area causes more resistance, and the resistivity which is determined by the material of the electrical component, alongside temperature.

The resistivity is resistance per 1m length with a 1m^2 cross-sectional area, and its inverse is conductivity.

Experiment to find resistivity of a wire: 

1. Measure the wire's diameter using a micrometer, assuming the wire is cylindrical with a circular cross-section. 

2. The wire should be clamped to a ruler with a joining circuit where ruler reads zero. 

3. Attach the flying lead to the test wire, and record the length of the test wire…