Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Different factors that affect the resistance on a wire.
Member rating: No Rating | Words: | Submitted: Mon Jan 05 2004
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:
Resistance occurs when the electrons travelling along the wire collide with the atoms of the wire. These collisions slow down the flow of electrons causing resistance. Resistance is a measure of how hard it is to move the electrons through the wire. Resistance is measured in Ohms. This was the scientist who discovered resistance. Ohm created a law, and called it Ohm's Law. "Ohm's Law deals with the relationship between voltage and current in a metallic conductor." This relationship states that "The potential difference (voltage) across an ideal conductor is proportional to the current through it." Current (I): is the result of electrical charges on the move. This charge is more than often carried by the negative electrons. For the current to flow there must be a continuous pathway between the terminals of the power supply. Current is calculated using a device called a Ammeter and is measured in amperes (A) Voltage (V) (also known a Potential Difference....
Get instant access
- Instant, unlimited access to our documents in full
- Swap your work for free access, or pay £4.99
- To see the full version of this document and 150,117 others
