So a footing needs rebar on the bottom, a simple beam or slab needs rebar on the bottom, etc.
Theory 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.
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 in parallel.
These measurements are then applied to this formula: This means that the resistance of a metallic conductor is constant providing that the temperature also remains constant.
Furthermore, the resistance of a metal increases as its temperature increases. This is because at higher temperatures, the particles of the conductor are moving around more quickly, thus increasing the likelihood of collisions with the free electrons.Resistance of a Wire Coursework I have been asked to find out what affects the resistance of a wire.
I have decided to go about this by seeing how changing the length of a wire affects the resistance.
working with applications of new welding processes like "Controle short circuit" and cored wires for creep resistence steels. Independent Coursework.
Mechanization of cored wire welding Title: Sr. Manufacturing Engineer at . Resistance Coursework.
Extracts from this document Introduction. Resistance.
This causes the wire to warm up. If the resistance of the wire is high and the current is large, the wire may get red hot.
To investigate the factors affecting current in a wire. The course covers general assembly using pins and wire. You’ll also learn wire wrapping techniques and materials usage.
You’ll make your own decorative chains, chokers, bracelets and earrings. Write a program to calculate the total resistance of a series or parallel circuit. The maximum number of resistors is two. We need to decide whether the user wants the total resistance of . Thesis India is India’s oldest and trusted PhD consulting company offering PhD thesis help, project help and consultation services in India.
You Know More Than You Think You Do by Emily Campbell, in collaboration with Anthony Burrill and Adams of Rye.