Factors Which Affect the Resistance of a Wire
To start off this experiment I feel that it is suitable to explain the
main facts of this study. Below is a section explaining the resistance
in detail.
Facts on Resistance:
I have shown how resistance occurs.
· WIRE
· ATOMS
· ELECTRONS
Resistance occurs when the electrons traveling 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.
Factors:
1.Temperature: If the wire is heated up the atoms in the wire will
start to vibrate because of their increase in energy. This causes more
collisions between the electrons and the atoms as the atoms are moving
into the path of the electrons. This increase in collisions means that
there will be an increase in resistance.
2.Material: The type of material will affect the amount of free
electrons, which are able to flow through the wire. The number of
electrons depends on the amount of electrons in the outer energy shell
of the atoms, so if there are more or larger atoms then there must be
more electrons
available. If the material has a high number of atoms there will be
high number of electrons causing a lower resistance because of the
increase in the number of electrons. Also if the atoms in the material
are closely packed then the electrons will have more frequent
collisions and the resistance will increase.
3.Wire length:If the length of the wire is increased then the
resistance will also increase as the electrons will have a longer
distance to travel and so more collisions will occur. Due to this the
length increase should be proportional to the resistance increase.
4.Wire width:If the wires width is increased the resistance will
decrease. This is because of the increase in the space for the
electrons to travel through.
In "Energy Story" uses an explanation of atoms and tells us the parts of an atom and its structure. In the text it
The Atomic Theory is a theory that explains what matter is made of. The Atomic theory states that matter can’t be divided as it is made up of minute particles called atoms that cannot be separated. The very word atom is derived from the Greek word Atmos which means indivisible.
Atoms are electrically neutral; the electrons that bear the negative charge are equal in number to the protons in the nucleus
He then descibes how an isotope is constructed. also he says an element with an
An atom, by definition, is the smallest part of any substance. The atom has three main components that make it up: protons, neutrons, and electrons. The protons and neutrons are within the nucleus in the center of the atom. The electrons revolve around the nucleus in many orbitals. These orbitals consist of many different shapes, including circular, spiral, and many others. Protons are positively charged and electrons are negatively charged. Protons and electrons both have charge of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
The Resistance of a Wire Investigation Aim: To investigate how changing the length of a wire affects the resistance. Prediction: I predict that the longer the piece of wire, the greater the resistance will be. This is because the current is resisted by the atoms in the wire. In a longer piece of wire, there would be more atoms for the electrons to collide with and so the resistance would be greater. The shorter piece of wire will have less resistance because their will be less particles causing less collision.
atom doesn’t exist because you can’t see one. We who have a grasp of our
I also decided to use a wooden block to keep hold of the wire, because
In 1803 this theory was finalised and stated that (1) all matter is made up of the smallest possible particles termed atoms, (2) atoms of a given element have unique characteristics and weight, and (3) three types of atoms exist: simple (elements), compound (simple molecules), and complex (complex molecules).
The theory of quantum mechanics has divided the atom into a number of fundamental sub-atomic particles. Although the physicist has shown that the atom is not a solid indivisible object, he has not been able to find a particle which does possess those qualities. Talk of particles, though, is misleading because the word suggests a material object. This is not the intention for the use of the word in quantum physics. Quantum particles are, instead, representations of the actions and reactions of forces at the sub-atomic level. In fact, physicists are less concerned with the search for a material particle underlying all physical objects and more interested in explaining how nature works. Quantum theory is the means that enables the physicist to express those explanations in a scientific way.
Humans, bears, and trees all have one thing in common, they all have atoms and molecules. They also need the four elements of life to survive, Carbon, Hydrogen, Oxygen and Nitrogen. An atom is the smallest part of an element that is still that element. A molecule is two or more atoms joined and acting as a unit. There are four different types of molecules, they are, carbohydrates, lipids, proteins, and nucleic acids.
Investigating the Effect the Thickness of a Wire has on Its Resistance. Equipment:.. Nickel Wire cut into 10 pieces of 30cm length (Ruler, Pliers). Two crocodile clips Five Pieces of Wire Power Source Variable Resistor Ammeter Volt Meter Method: The.. =
Factors Affecting the Resistance of a Wire The aim of this experiment is to investigate one factor that affect the resistance of a wire. I will do this by performing an experiment. First I will need to identify the factors that effect resistance. There are a few factors that affect the resistance, it is determined by the properties an object has.
The Relationship Between Length, Width and Resistance of a Wire Aim: To investigate how the length and width of a wire affects the resistance of the wires. What is the resistance to a s 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. gold has less resistance to the sand. For example, gold has more free electrons than. iron and, as a result, it is a better conductor.
Investigating the Resistance of a Wire The aim of this investigation is to see how the length of a wire affects its resistance. Background knowledge To make current flow through a conductor, there must be a potential difference (voltage) across it. As the current continues to flow there are certain factors which increase the resistance; Length of wire: as the length increases there will be a higher percentage of fixed atoms, therefore the electrons carrying the charge will collide more frequently, increasing the resistance Surface Area of wire- As you increase the surface area of a wire the resistance will decrease because the electrons will be able to travel by many different routes making the conduction easier. Type of conductor- If the wire is a good conductor of electricity then the resistance will be less because the electrons are able to flow through the wire avoiding as many collisions with the positive protons.