1503 results found

#### "Making an Electromagnet"

Project in Physics Technical Paper "Making an Electromagnet" Submitted by: Group 10 Audrey Mae Selda Ednard La Rosa Easter Cindy Mutia Ken Bjanli Te Year 4- Diamond Submitted to: Ms. Shella Mae Cascaro Physics Teacher Date of Submission: December 14, 2005 Wednesday A. Statement of the Problem/ Objectives: The following are some objectives or what the proponents would like to carry out in the progress of this project: To be able to make an electromagnet in the simplest way. To be able to relate the number of turns of wire with the strength of the electromagnet To be able to attract as many paper clips as possible. To be able to explain and recognize the principles and concepts behind electromagnetism. B. Materials and Methods: I. Materials: These are some of the materials used by the proponents in making the electromagnet: One iron nail Stranded copper wire One or more D-cell batteries Scissors Paper clips II. Methods: These are what the proponents did in making the electromagnet: The proponents first gathered all the materials needed for the making of the electromagnet. The next thing that the proponents did was to remove some insulation. So a pair of scissor or a cutter was used in order to remove the insulating rubber starting from each end of the wire to expose the copper wire. The wire was wrapped around the nail in a spiral manner.

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• Word count: 1186
• Level: GCSE
• Subject: Science

#### The topic of which I have been studying is energy transfers, how energy can not be destroyed but only changed into another such as potential into kinetic, this the energy transfer which shall take place in my investigation.

Science Course Work Introduction The topic of which I have been studying is energy transfers, how energy can not be destroyed but only changed into another such as potential into kinetic, this the energy transfer which shall take place in my investigation. The aim of this investigation it to find out how the height of the ramp affects the speed the ball travels. Plan I am going to investigate how the height of a ramp affects the speed of which a ball travels. To make sure my test is correct I will need to keep several things the same these are: The distance the ball has to role, to get the speed. The length of the ramp. The ball, so that is the same mass and the surface so that the texture of it will be the same. The thing I will be changing is the height of the ramp. To do this I will use a ramp, a bouncy ball, a meter ruler, a stop watch and a clamp. All these will be provide by school. I will start by raising the ramp at 0.20 meters intervals using the clamp, starting at 0.20 meters and finishing at 1 meter. First I will mark a meter on the bench from where I will hold the ramp. After I have measured the 0.20 meters height I will roll the bouncy ball down the ramp and time it once it has reach the foot of the ramp and stop the stopwatch once the ball has reached the meter mark. I will do this three times so that my results are accurate and then find my

• Word count: 1813
• Level: GCSE
• Subject: Science

#### I chose to do my sensors project about sliding potentiometers because they are very common in every day life, and I thought it may be interesting to discover how they work.

Physics coursework Introduction I chose to do my sensors project about sliding potentiometers because they are very common in every day life, and I thought it may be interesting to discover how they work. There are potentiometers on lots of everyday household appliances, sliding and rotary potentiometer on hi-fis to change the volume or tuning, washing machines and dishwashers to change settings and other electrical equipment and machine. As the world becomes more computer reliant sensors will be used more often, especially potentiometers as they are easy to operate. Rotary and sliding potentiometers both work in a similar fashion. As the slider gets moved along, the voltage increases as the potential difference changes. A rotary potentiometer works the same way, but is twisted round, so rather than measuring displacement, degrees are considered. I will take this simple idea and look into true values and patterns. Plan Fig 1. Circuit diagram of the circuit to be built.(Not to scale) I am going to build the diagram as shown above and slide the potentiometer along and see what the different readings of the voltmeter are. The equipment I shall be using is: * Wires x 4 * A 59mm sliding potentiometer (5kB) * A digital voltmeter, Rapid 212 DMM. Reading error: 0.005V * 30cm Ruler. Accuracy: 0.5mm * Stopwatch, Unilab Accuracy: 0.005 secs * Power Pack (1kWIN L.V power

• Word count: 1616
• Level: GCSE
• Subject: Science

#### Investigating how the length of a piece of wire affects resistance in a circuit.

Stephanie Wickers 1st July, 2003 Investigating how the length of a piece of wire affects resistance in a circuit Aim Resistance is measurement which describes how difficult or how easy it is for an electron to flow through a conductor in a circuit. Resistance is measured in Ohms. In this investigation I am going to be trying to find out and do further research into why resistance is affected by the length of a piece of wire. Research There are many factors effecting resistance in a circuit and the four main ones are Length, Temperature, Material, and Thickness. I have done research to find out how and why these factors affect resistance. If the length of the wire is increased then the resistance will also increase proportionally. This happens because the electron has further to travel in the circuit and therefore there is more chance of a collision between an atom and an electron. If the thickness of the wire increases then the resistance will decrease and if the thickness decreases the resistance will increase. This is because the increase in area will enable the electrons to move around more freely. This in turn will reduce the number of collisions between atoms and electrons and will lower the resistance as the flow of electrons is not interrupted as much by the atoms in the wire. If the wire is heated the atoms in the wire will vibrate due to the increase

• Word count: 3200
• Level: GCSE
• Subject: Science

#### "Are rechargeable batteries more economical than alkaline batteries?"

IB Extended Essay 07-05-2003 Candidate Name: Willy Gunawan Candidate Number: D0612-027 School: Wesley College, Melbourne School Number: 0612 Subject: Chemistry "Are rechargeable batteries more economical than alkaline batteries?" Words: 3711 Acknowledgements: 07/04/2003 I acknowledge that the work of others has been appropriately referenced and that all unacknowledged work is genuinely mine. Along with this I want to thanks all the support given by my family, and Ms. Karen Hamilton which has been very patient in guiding me and was a tremendous mental support and me during this hectic time of doing the assignment itself. Thank you, for making it possible for me to finish the project. As English is my second language, a lot of effort and time has been put into ensuring that my language is properly used, and make sense. Yet it is inevitable that I made linguistic mistakes along the way. I would like to use this opportunity, to apologise if that is the case. Willy Gunawan Contents: Title Page..............................................................................................1 Acknowledgements..................................................................................2 Table of Contents....................................................................................3 .

• Word count: 4752
• Level: GCSE
• Subject: Science

#### John Jevons - 11HD

John Jevons - 11HD GCSE Science Coursework: Physics Investigation Aim: To investigate if the length of a wire determines the resistance of a wire by using different lengths of nichrome wire. Planning: A Current is measured in amps (A). It is a measure of the charge that flows per second. It uses the formula Current = charge / time. Charge in itself represents the number of electrons flowing through the wire per second. It is measured with an ammeter. Resistance is where a metal wire is connected to an electric circuit, and the voltage from the battery sends electrons through the wire. The electrons that collide with the metal ions of the wire and slow down. Resistance is measured by how freely the electrons move within a metal wire, high resistance meaning that the electrons have difficulty moving, while a low resistance, meaning the opposite, that they move freely and aren't slowed. The four following factors affect resistance:- Thickness of the wire - The thicker the wire, the more space the electrons have to move, therefore reducing resistance. Length of the wire - The longer the wire, the more the electrons have to travel, thus increasing resistance. Temperature - When the temperature of a metal is increased, the metal ions inside vibrate more, and so the electrons which are moving through have a higher chance of hitting a moving metal ion rather than a stationary

• Word count: 940
• Level: GCSE
• Subject: Science

#### Copper, Constantan, Manganan and Nichrome - which is the best conductor?

Physics Coursework Copper, Constantan, Manganan and Nichrome - which is the best conductor? Background Knowledge Conduction of electricity in metals requires a potential difference across two ends of a conductor for it to occur. This causes a flow of electrons in the wire, more commonly known as a current. The electrons in this current are free, meaning they are can move around in the wire freely. The number of free electrons depends on the wire. The more free electrons the better a conductor it will be. The electrons may however come up against some resistances while flowing in the current. Resistance is the result of energy loss as heat. These resistances or obstacles, which slow the electrons down, are other electrons and the fixed particles of the metal i.e. atoms. These slow the electrons down because while they are flowing freely they collide with the other electrons and the fixed particles. These collisions convert some of the energy that the free electrons are carrying into heat. The resistance of a length of wire is calculated by measuring the current in the circuit (in series) and the voltage across the wire (in parallel). Then the resistance can be found by incorporating these values into this formula: - R = V / I Units V = Potential Difference (Voltage) measured in volts I = Current measured in amps R = Resistance measured in ohms It is also required to

• Word count: 2907
• Level: GCSE
• Subject: Science

#### What affects the resistance of a wire?

What affects the resistance of a wire? Planning Introduction We are trying to find out what affects the resistance of a wire. Resistance is the slowing down of electric flow (flow of electrons) due to metal ions. The equation to measure resistance is: Resistance = Voltage ÷ Current R = V / I Resistance is measures in 'volts per amps' or, more commonly, 'Ohms' (?). There are a few things that affect resistance. I think these are: * Length of wire * Diameter of wire * Material/type of wire * Temperature I am going to try and find out how the diameter of the wire affects the resistance of the wire. I will do some tests find out how the diameter affects the resistance. I think that if I increase the diameter the resistance will decrease. Method . First I will set up a circuit with a power pack, voltmeter, ammeter and a space for a 1metre wire. 2. Then I will get a metre ruler and measure 1 metre of the first size of wire and cut it with wire cutters. 3. I will stick the wire to the metre ruler with two pieces of sticky tape 2cm away from either end to keep the wire straight. 4. I will then put the wire (attached to the ruler) in the gap in the circuit and attach it to the circuit. 5. After turning the power pack on, I will record the numbers on the voltmeter and ammeter. 6. I will then repeat steps 2 to 5 with 4 other different Standard Wire Gauge sizes of

• Word count: 3455
• Level: GCSE
• Subject: Science

#### Investigate the resistance of different lengths of wire and to look for a correlation between the length of the wire and it's resistance.

Plan for Science Course Work The Resistance of Lengths of Wire Aim: To investigate the resistance of different lengths of wire and to look for a correlation between the length of the wire and it's resistance. Research: Ohm is the common unit of electrical resistance, equivalent to one volt per ampere and represented by the capital Greek letter omega. The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. The resistance of a conductor, or circuit element, generally increases with increasing temperature. When cooled to extremely low temperatures, some conductors have zero resistance. The Greeks discovered electricity over 2000 years ago, and electrons were discovered by J.J Thompson in 1844. Method: I will test different lengths of wire by inserting it into the circuit shown below and record the readings of the ammeter in a table. I will then calculate the resistance by dividing the potential difference, which is the number of joules transferred per coulomb (measured in volts), by the current, coulombs per second (measured in amps) of the circuit to give me the resistance in ohms. Resistance limits how easily an electric current can flow through a substance. I will be using the same voltage throughout my experiment as the only variable which I

• Word count: 1704
• Level: GCSE
• Subject: Science

#### Investigate how the resistance of a wire changes due to different factors experimented on it.

PHYSICS COURSE WORK PLAN Aim Investigate how the resistance of a wire changes due to different factors experimented on it. Factors Factor 1 - The length of the wire may affect the wire's resistance. According to the length of the wire, current, voltage and resistance may change. For example it may occur that the shorter the length of the wire, the higher the voltage and the lower the current meaning that resistance of the wire should increase. Factor 2 - The type of wire may affect the wire's resistance. For example if the wire is copper then it may occur in the experiment that the resistance may decrease due to the fact the current is higher then it would be in a different type of wire. Factor 3 - The thickness of the wire may have an affect on the wire's resistance. It may occur that the resistance decreases because the wire is thin or that when the wire is at its thickest the resistance will be at its highest. Factor 4 - The temperature applied on a wire may have an affect on its resistance. For example it may mean at a higher temperature there might be more voltage applied across the wire meaning there will be more resistance. I have chosen to investigate the length of the wire. Prediction I predict that the longer the length of the wire, the higher its resistance. I predict this because using my preliminary results and 'Ohms Law' we know that as the distance

• Word count: 2054
• Level: GCSE
• Subject: Science