Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Investigating the relationship between the length of a pencil lead and its electrical resistance.
Member rating: No Rating | Words: | Submitted: Fri Mar 31 2006
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
AS PRACTICAL ASSESSMENT 2 Investigating the relationship between the length of a pencil lead and its electrical resistance. SECTION 1 : PLANNING * The aim of the experiment The aim of the experiment is to establish the relationship between the length of a pencil lead and its electrical resistance. * List of the apparatus to be used - Pencil lead of a length of about 10-15cm - Power supply - Ammeter (3SF) - Voltmeter(3SF) - Micrometer +/- 0.01 mm - Metre Ruler (0-100 cm) +/- 0.1 cm - Standard connecting wires - Crocodile clips - Sandpaper - Protection resistor * The Diagram * Method During my experiment I will: 1. Set up apparatus as shown in the diagram. 2. Measure the resistance of the protection resistor with the multimeter and record its value above the table 3. use the sand paper to remove the upper layer of coating from the rod, moving the paper wrapped around the lead along the full length of it. 4. Measure the diameter of the...
To see the full version of this document, and 145,345 others
