Secondly, the width of the wire is a factor. Resistance depends on the material the wire is made of. The hotter wire has a larger resistance because of increased vibration of the atomic lattice.
Firstly, temperature is a factor. 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 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.
I could have considered using a new piece of wire each time in order to regulate the temperature more stringently.
In addition, my prediction that doubling the length of the wire increases the resistance by a factor of two is correct see Table 4. When using a power supply, high currents will cause the safety cut-out on the power packs to automatically switch it off.
The electronic configuration of an atom determines how willing the atom will be to allow an electron to leave and wander through the lattice. The charge flowing in a wire is carried by the electrons that orbit the atoms that make up the wire.
I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack. Prediction I predict that, the longer the wire is, the more resistance there will be due to more collisions between the electrons and atoms.
The negative connection is the centre of the base with an annular ring of insulator between it and the can. I will also control, using the power pack, how many volts pass through the wire.
If the outermost shell or sub-shell with transition metals is less than half full then the atom is willing to let those electrons wander and the material is a conductor. I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit.
To support my prediction and conclusion, I could do further experiments. Introduction In this piece of coursework, I have been set the task of investigating factors that affect the resistance of a wire. Resistance is the result of energy loss as heat.
This means that the resistance of a metallic conductor is constant providing that the temperature also remains constant. The collisions between the electrons and the atoms cause the electrons to move slower, which in effect causes resistance.
For example, I could use different types of wire instead of using only nichrome.Extended experimental investigation: Electricity Several expressions link the factors together. Resistance measured in ohms (Ω) is found by Ohm’s law, R=V/I. V represents voltage, a measure of electrical from the measurement of the total resistance to give the resistance of the copper wire that was to be measured.
The Toyota vehicle recalls involved three separate but related recalls of automobiles by Toyota Motor Corporation, which occurred at the end of help writing my paper investigating factors affecting resistance of a wire and start of Apr 19, · For example, when the length of the wire is 20cm the resistance is ohms; when the length of the wire is 40cm the resistance is ohms, which is roughly double.
In my main investigation I will see if this observation applies to my ultimedescente.coms: Introduction The purpose of this investigation is to expose the factors responsible for affecting the resistance of a wire in an electrical circuit. Many factors 2, Words | 11 Pages Investigation Into Association Between Previous/5(1).
Class practical A simple investigation of the factors affecting the resistance of a wire. A simple investigation of the factors affecting the resistance of a wire.
Apparatus and materials. For each student group. Cells, V, with holders, 2. Crocodile clips, 2. Ammeter (0 - 1 amp), DC. Factors Affecting the Resistance of Wire Words | 8 Pages. Aim: To investigate the factors that affect the resistance in a conductor. The main factors that affect the resistance in a conductor are: · Length · Temperature · Cross sectional area · Material · Magnetism The factor that we are going to change is the cross sectional area.Download