Resistivity Of Graphite In A Pencil

Calculate the resistivity of graphite using the equation in the background information. Resistivity of pure graphite is 1380 10 8 ohmsmm2 that is 00000138 ohmmeter. Pencil graphite as a variable resistor duration.

Inspiration Resistivity Of Graphite In A Pencil, How does the resistivity of the two different types of graphite compare.

Resistivity of graphite in a pencil. H25 ohms 2h20 ohms b7 ohms 2b6 ohms and hb 19 ohms. Resistivity of a pencil resistor. What conclusions can you draw from your graph. Now 1 square meter of graphite is quite a lot actually 1000000 mm2 thus 1 mm2 is 138 ohmmeter.

Graph the data collected in table i plotting resistance vs. Graphite has many forms and uses in our everyday life. Electrical conductivity of graphite this sample is intended to inform the design of assessment instruments in the senior phase of. Graphite pencil lead resistance experiment saabcrow.

Academiaedu is a platform for academics to share research papers. Graphite paper circuit. The rod here being 22 mm diameter have a square area of 346 mm2. Natural graphite can be found in china mexico canada ukraine and brazil and it is used as a lubricant filler for flexible graphite artistry tools kevlar and of course pencils.

It has a very low resistivity ranging from 9 to 40 uwm. The resistivity of a pure graphite is given by 00000138 ohmmeter and as discussed above there are different grades of graphite leads used for manufacturing pencils and the resistance of these different grades of the graphite leads can be given as follows. Physics 2007 sample assessment instrument and student response extended experimental investigation. Length for each pencil.