- Join over 1.2 million students every month
- Accelerate your learning by 29%
- Unlimited access from just £6.99 per month
Resistance of a Wire
The first 200 words of this essay...
GCSE Physics Coursework - Resistance of a Wire Coursework
Resistance of a Wire
To investigate how the resistance of a wire is affected by the length of the wire.
What is resistance?
Electricity is conducted through a conductor, in this case wire, by means of free electrons. The number of free electrons depends on the material and more free electrons means a better conductor, i.e. it has less resistance. For example, gold has more free electrons than iron and, as a result, it is a better conductor. 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. 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
Found what you're looking for?
- Start learning 29% faster today
- Over 150,000 essays available
- Just £6.99 a month
Not the one? We have 100's more
Electricity and Magnetism (view all)
- Investigating the effect of length on the Resistance of a wi...
- Stopping Distance Investigation
- How the resistance of a wire is affected by the length of th...
- Electromagnetism - investigating what effect increasing the ...
- Physics Coursework: Factors affecting resistance of a wire. ...
- Resistance of a Wire - Triple Science
- Physics Project Maglev Trains
- Static Electricity.
- Resistance of a wire coursework
- Aim: I am going to carry out an investigation to find how th...
""Sabrina, Washington. IB English, History, Chemistry, Anthropology.
""Asmaa, UAE. GCSE Student. Biology, Physics, Chemistry, Maths and English.