Resistance of a Wire

Essay specific features

 

Issue:

Science

 

Written by:

Hector T

 

Date added:

April 22, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

7 / 1878

 

Was viewed:

3003 times

 

Rating of current essay:

 
Essay content:

The free electrons are given energy and as a result move and collide with neighbouring free electrons. This happens across the length of the wire and thus electricity is conducted. Resistance is the result of energy loss as heat. It involves collisions between the free electrons and the fixed particles of the metal, other free electrons and impurities...
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These collisions convert some of the energy that the free electrons are carrying into heat. How is it measured? The resistance of a length of wire is calculated by measuring the current present in the circuit (in series) and the voltage across the wire (in parallel). These measurements are then applied to this formula: V = I ? R where V = Voltage, I = Current and R = Resistance This can be rearranged to: R = V I Ohm's Law It is also relevant to know of Ohm's Law, which states that the current through a metallic conductor (e...
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