Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Measuring The Resistivity Of A Pencil Lead.
Member rating: No Rating | Words: | Submitted: Tue Sep 30 2003
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
PHYSICS COURSEWORK 16TH JANUARY 2003 Measuring The Resistivity Of A Pencil Lead Hypothesis The resistance of two objects is not always the same due to "resistivity". The resistance of a uniform conductor depends on : * Its length (L) * Its cross-sectional area (A) * The material of which it is made Therefore, the relationship between these three variables and resistance is as follows: Where : - R = Resistance P = Resistivity L = Length A = Cross-sectional Area Resistivity is defined as a materials opposition to the flow of electric current of a cubic metre of a material. To measure the resistivity of pencil lead I will need the following apparatus....... * 1 x Power Pack (Ranging from 2V - 12V) * 1 x Voltmeter (Reading up to 20V, giving readings to 0.00 with a ?3% error reading) * 1 x Ammeter (Reading 20m/10A, giving readings to 0.00 with a ?0.5% error reading) * 1 x Rheostat * 1 x Micrometer (with...
To see the full version of this document, and 145,841 others
