How does Length affect resistance? Coursework Aim To find out how the length of a wire can affect resistance. Factors affecting resistance Temperature Length of wire Thickness Type Resistance is a force which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. Resistance is measured in ohms. The symbol for an ohm is Ω Here is the rule for working out the resistance of a circuit: V/I = R or V - Volts I - current R - resistance Variables length of wire thickness type of wire current voltmeter temperature Dependant variables length Prediction As we are …show more content…
The smaller length of 20cm has a resistance of 1.01 (Ω) and the longer wire of 100cm has the resistance of 4.86 (Ω) which is clearly higher. Trends and Patterns The pattern/ trend I can see is that the longer the wire the higher the resistance or the shorter the wire the lower the resistance. Science and Detailed Science explanations The longer the length of the wire the higher the resistance. I think this because the longer the wire the more atoms and so the more likely the electrons are going to collide with the atoms. So if the length is doubled the resistance should also double. This is because if the length is doubled the numbers of atoms will also double resulting in twice the number of collisions slowing the electrons down and increasing the resistance. My graph should show that the length is proportional to the resistance. Electrons collide with atoms more often in a long wire than they do in a short wire. This means that the resistance in a wire increases as: The length of the wire increases. Mathematical analysis The graph of my experiment is approximately a straight line through the origin, which means R is almost proportional to L. This means that if the length is 40cm, and resistance is 2 which in my case is almost that (1.92), then if length is doubled to 80cm, resistance also doubles to 4 which in my case
The objective of this lab was to observe the behavior of a capacitor while charging through a resistor. Overall, the objective of the lab was achieved since an exponential curve was obtained from a charging capacitor.
What are some of the basic components that make up simple circuits and what do they do?
In reference to the collision theory, molecules act as small spheres that collide and bounce off each other, transferring energy among themselves when the collide. In order for a reaction to occur, there must be collisions between molecules. Through experimentation, factors are discovered that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, surface area, the physical state of reactants, and a catalyst. This experiment regarding the factors that affect reaction rate tests the effects of increased concentration and
A greater number of electrons correspond to a great polarizability of a molecule. Greater polarizability leads to greater dispersion forces. Thus, as molar mass increases, the number of electrons increase, which increases the polarizability of the molecule and hence the strength of the dispersion forces of the substance.
In metallic bonding, the reason it is so good at conducting heat and electricity, is the electrons are loosely held in the atom. Also, the structural pattern of metals is hexagonal-close-packing (Francis, E . . .). Metallic bonds are when the electrons are shared and are able to move and how C models show that. The idea of the electrons being able to move, delocalized electrons, helps produce its characteristics like conductivity and malleability, etc. (Anderson . . .). In a redox reaction, oxidation and reduction happens. Also you can’t have reduction happening without oxidation also happening along with it. Redox reactions oxidation is the loss of electrons and reduction is the gain of electrons (Redox . .
To get the electrons to move at the same speed, we would have to turn up the voltage and this would overheat the expensive apparatus’ filament.
Why do electrons (blue dots) move? Draw a diagram of the battery, label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal of the battery.
Based on the results of the experiment the order of reactivity for the metals is Zn > Fe > Sn. A more reactive metal loses electrons more easily than a less reactive
To understand how this electricity works we must start with the basics. The atom is the smallest unit of matter, consisting of protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Electric charges that are the same repel each other and charges that are different attract each other. Electric charges can exist alone, unlike magnetic poles.
This occurs when there is unbalanced number of neutrons and protons, unlike current electricity that occurs when there are conductors involved
When tested in the lab, it was found that Advance Wire was mediocre in conductivity & abrasiveness, while also being heavier than all other samples.
As most people know (or don't know, whichever is the case) the component of an electrical circuit that causes energy loss is called "resistance," which can be defined as a materials opposition to current being passed through it. Usually, this resistance results in the production of heat, sound, or another form of energy. In many cases, this transformation of energy is useful in such applications as toasters, heaters, and light bulbs. Even though it is a useful property, resistance often gets in the way of performance in such cases as high voltage transmission wires, electric motor output, and other cases where internal system energy losses are unwanted. This is where the phenomenon of superconducting materials comes into play and may
1. Electric charges attract or repel one another with a force inversely proportional to the square of the distance between them: unlike charges attract, like ones repel.
The outer shell of electrons that orbit the nucleus of an atom is called the valance shell. This is what makes a copper atom conduct. For a copper atom the number of electrons is one. When a charge of electricity is placed in the end of a wire the electrons move into the wire. Since there is only one electron in the valance shell of a copper atom it can be easily dislodged with a small amount of energy causing it to jump to the next atom. This will then cause the valance electron of that atom to jump to the next atom and so forth. This movement happens very fast making it possible for a large number of electrons to move through the wire. An example of a conductive atom is shown figure 1.
Throughout this research paper, the reader will have a better understanding of the different forms of resistance. Also the reader will have the ability to compare the two types of resistance which were active and passive. And finally the reader will be abl