Investigating How the Length of a Wire Affects Its Resistance Planning: Risk Assessment: * I will handle the power supply carefully. * I am going to only use a maximum voltage of 2 volts. * I will be careful when handling the mains equipment. * I will make sure I have a clear space to work in and nothing on the floor around me. In this investigation, I will set up a simple circuit to be able to read the voltage and current when the length of wire changes, so I then can work
The Resistance of a Wire Introduction In this investigation I will be trying to find out the resistance of a piece of constantan wire. I know that according to ohms law, the p.d is proportional to the current so if the p.d doubles so will the current. Through past experiments I know how to work out resistance, to work it out I use this formula Where the resistance is R, the p.d is V and the current is C, from this you can work out the resistance of any circuit. Aim of the Preliminary
Wire Resistance Investigation Planning -------- Aim --- In this experiment the resistance change in a wire will be investigated. I will be investigating if the thickness or cross-sectional diameter of the wire affects the resistance. Variables --------- The input variable will be the thickness of the wire to the nearest millimetre. The output variable will be the readings on the ammeter and voltmeters. The controlled variables will be the length of wire and the current
How the Resistance of a Filament Bulb Varies Its Current Flowing through It Aim: the purpose of this investigation is to find out how the resistance of a filament bulb varies with current flowing through it. Hypothesis: I think the higher the voltage the brighter the bulb will be because then there will be an increase of current and the electrons are given more energy and more are forced through, therefore the bulb would be able to resist more. If the voltage increases the bulb will shine
Resistance in a Wire Introduction: ============= Metals conduct electricity because the atoms in them do not hold on to their electrons very well, and so creating free electrons, carrying a negative charge to jump along the line of atoms in a wire. Resistance is caused when these electrons flowing towards the positive terminal have to 'jumps' atoms. So if we double the length of a wire, the number of atoms in the wire doubles, so the number of jumps double, so twice the amount of energy
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: V = I ´ R where V = Voltage, I = Current and R = Resistance This can be rearranged to: R = V I Ohm’s Law It is also relevant to know of Ohm’s Law, which states that the current through a metallic
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
moving particles heats up the particles in the resistor causing them to vibrate more. So as the particles vibrate, they obstruct the electrons that are trying to pass through more frequently and so a greater resistance is built up. [IMAGE]In an electrical curren... ... middle of paper ... ...se, past a certain temperature, oil becomes quite dangerous to heat. If I did this I would be a definite improvement on my result because it would mean that I could investigate further on the behaviour
The purpose of a RCT is to clean out the pulp cavity of neurotic tissue and then to create a complete seal that will prevent bacteria from entering and leaving the RC. A RCT might be need because of gross caries reaching the RC or leakage of previous RCT or trauma which will lead to loss of vitality resulting in interruption of blood and/or nerve supply. The RCT can be divided according to the following steps: 1. Preoperative Radiograph A preoperative radiograph provides the dentist with information
Task One In this task, three methods of measuring temperature have been summarized. The fundamental physics and equations underlying the measurement, a figure supporting the description, a description of the range, accuracy and precision, advantages and disadvantages, and how these devices produce digital signals will be discussed in this task. Vapor Pressure Thermometers The system of a Vapor Pressure Thermometers contains both vapor and liquid but it is still considered as a type of gas filled
Voltage stability is defined as the ability of a system to restore steady voltages at all buses in the power system after being exposed by any disturbance from a given initial operating conditions. Voltage stability purely depends on the capability to maintain equilibrium between load supply and load demand from the consumer end. When there will be any progressive fall or rise of voltages of some buses that can cause instability. Power system stability is expressed by the capability of a power system
compass is used to measure the direction and the latitude, this can be used to find the true north of a particular place. Later as time passed and technology advanced the wheel came into use, there were two types of wheel that came into use the electrical and mechanical, while they ran in different ways they both worked in similar ways by rolling from the start to the end point. As the 1900s rolled around 2 main new tools came into play the planimeter, which was used to measure asymmetrical land
This is because as the thermistor increases in temperature the lattice atoms move faster and are colliding with the electrical current and slowing down the flow of charge. In a normal wire this would make the resistance decrease but because a thermistor is a semiconductor there is a second stronger effect which out weighs this. This effect means that the outer
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: ======= F The Circuit was set up as in the circuit diagram overleaf with a power source of 5 Volts, an ammeter, crocodile clips (holding wires), and a variable resistor in series and a Voltmeter in parallel with the wires
The Length of a Wire Affects Its Resistance Scientific Enquiry: I know that metals are good conductors of electricity. Metals are good conductors because their electrons are easily released allowing electricity to flow. The electrons can carry current because they split up from the positive ions, so they are free to move and to carry current. Factors that affect resistance: 1. Length – the longer the wire the more atoms there are for the current to push through. 2. Width –
PARTICLE SIZE ANALYSIS Particle size analysis is a method or part of laboratory techniques of finding the size range and or the usual mean size of the particles in a residue or in a liquid substance. This method is belong in a ‘particle science’ and its determination is carried out usually in ‘particle technology’ laboratories. Particle size influences many properties of particulate materials and is a valuable indicator of quality and performance. This is true for powders, suspensions, emulsions
Investigating the Relationship Between the Length of a Wire and Its Resistance Aim: To find the relationship between the length of a wire and it’s resistance. Planning: We conducted a preliminary experiment to help us conduct the real experiment. In this preliminary experiment we aimed to find out what thickness and type of wire would be suitable for the experiment, and what range of lengths of wire and range of voltages and currents would be suitable for measuring. We discovered that
Experiment I Simple Voltage and Current Measurement Objective The objective of this experiment was to measure the Voltage and Current. Upon completion of this experiment I was able to: 1) Set the DC power supply to a specific voltage. 2) Properly connect the voltmeter to measure voltage. 3) Measure current with the ammeter. 4) Measure resistance with the ohmmeter. 5) Determine the accuracy of a given meter reading. Theory The theory required for this experiment was
Experiment on Electrical Resistance The electrical resistance of a material is its opposition to the flow of electric current (slowing the flow of electrons down). Resistance occurs when the electrons travelling 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. A current is the rate of the flow of charge (electrons) and the resistance
without it. They use measurement almost every hour of the day, with math calculations being very important as well. As he elaborated, the sizes of fasteners holding things together are a measurement, the correct size wrench