Resistivity coursework (HELP)

[JoneS]

Ok, the coursework i have been give is on the Resistivity of conducting putty. I know that Resistivity is the relationship between resistance, length and cross sectional area.
But what do i do?

Do i just get different lengths and thicknesses of a metal and find the resistance. Then work out the resistivity?

Help I'm confused.

 

[silentjay]

Resistance (ohms)= Resistivity(ohmmetres) x Length (metres)
Cross sectional area (metres squared)

just rearrange the equation to find resistivity

 

[ravenprp]

Hi there,

I understand that you are feeling confused about your resistivity coursework. Let me try to break it down for you.

Firstly, resistivity is a measure of how well a material resists the flow of electricity. It is affected by the length and cross-sectional area of the material, as well as its composition.

To complete your coursework, you will need to conduct an experiment to measure the resistivity of the conducting putty. This can be done by varying the length and cross-sectional area of the putty and measuring the resistance.

Here are some steps that may help you:

1. Set up a circuit with a power supply, ammeter, voltmeter, and the conducting putty.

2. Measure the length and cross-sectional area of the putty using a ruler or caliper.

3. Place the putty in the circuit and record the voltage and current readings on the voltmeter and ammeter, respectively.

4. Repeat this process for different lengths and cross-sectional areas of the putty.

5. Use Ohm's Law (V=IR) to calculate the resistance for each trial.

6. Plot a graph of resistance against length and another one for resistance against cross-sectional area.

7. The slope of these graphs represents the resistivity of the conducting putty.

I hope this helps to clarify things for you. If you still have any doubts, don't hesitate to reach out to your teacher or classmates for assistance. Good luck with your coursework!