Question

Explain a simple test to determine the electrical conductivity of a given material.

Answer 1

Step 1:

Measure and record the resistance of the material by using an ohm-meter.

Step 2:

Measure and record the length of the material.

Step 3:

Measure and record the area of the material.

Step 4:

Calculate the conductivity of the material by using the formula given below

`$ \sigma = (l)/(R \cdot A) $`

Step-by-step explanation:

Electrical Conductivity:

Electrical conductivity is a measure of how well a material can carry current.

For example:

Copper material has high conductivity whereas plastic has poor conductivity.

The opposite property of conductivity is called resistivity.

Electrical Conductivity Test:

The electrical conductivity of a material can be found by

`$ \sigma = (l)/(R \cdot A) $`

Where R is the resistance of the material, A is the area of material and l is the length of material to be tested.

Step 1:

Measure and record the resistance of the material by using an ohm-meter.

An ohm-meter measure the resistance according to the Ohm's law

`$ R = (V)/(I) $`

Step 2:

Measure and record the length of the material.

Step 3:

Measure and record the area of the material.

Step 4:

Calculate the conductivity of the material by using the formula given below

`$ \sigma = (l)/(R \cdot A) $`

Therefore, this is how we can find the conductivity of the material.