Free Constantan Essays and Papers

The Relationship Between the Length of Constantan Wires in a Circuit and the Current Aim To investigate the relationship between the length of constantan wires in a circuit and the current flowing through. Introduction ============ In a conductor electrons are able to jump between atoms. However in insulators they remain around a single atom unable to move. Constantan, a metal, unlike most other metals is a poor conductor although it is also a poor insulator. Being a metal it

Investigating how the Resistance of a Constantan Wire is Affected by Its Length Introduction: In this experiment we will be investigating how changing the length of a piece of Constantan wire will affect the resistance. Therefore the length will be an independent variable and all of the other variables we will try to keep the same. The other variables included in this experiment are temperature, thickness of wire and density of wire. Resistance is a force, which opposes the

a short one of the same thickness. Resistance is measured in Ohms. Variables There were three variables that our group was able to choose from; the length of the wire, the area of the wires cross section (thickness) or the type of wire (constantan or nichrome). All of these variables are able to change the resistance of the wire. Here are my thoughts and predictions on what would happen to the resistance of the wire as you change the variables. I think that if you change the length

Current, Voltage and resistance can be given by the Ohms Law to which is shown by the diagram below: [IMAGE]This means Voltage (V) = Current (I) x Resistance (R). To use this formula I will need wires such as Nickel Chrome, Manganin, Copper, and Constantan. From my scientific knowledge I know that long wires have more resistance than shorter wires and that thicker wire have more resistance than thinner wires. Preliminary work Before my actual investigation, I done a short experiment to

Resistance (Ω) Constantan 26 10 20 40 13.5 27.5 56.4 0.4 37.5 687.5 1410 Copper 26 10 20 40 0.9 1.5 2.5 0.4 22.5 37.5 62.5 Nichrome 26 10 20 40 32.5 59.4 118.3 0.4 812.5 1485 2957.5 Pre-test Findings: From my pre-test, I found out that using the nichrome wire would be best to use because it gave the both more reliable results and were also closer together. Constantan was not suitable

Prediction I believe the factors which affect the resistance of a wire are: 1. The length- the increase in length could increase the resistance. 2. The thickness of the core. 3. The material of which the wire is made up of- e.g. Copper, constantan and nichrone. 4. The number of strands within a wire: 5. The amount of current flowing through the wire. For this experiment, the factors which will be tested and measured will be the length of the wire, the material of which the wire

Resistance of a Wire Investigation Aim: The aim of this experiment is to explore the effects of resistance that travels through a constantan wire when induced with an electric current. Introduction Resistance is measured in Ohms (Ω). The formula for calculating resistance is: V=IR R=I/V I=V/R An electric current is commonly described as the 'flow of a sea of electrons'. Electrons are inside an atom, they are very small in size, and extremely small in weight compared to

I shall begin with a preliminary investigation in order to aid my final practical to be as accurate as humanely possible. Preliminary experiment ====================== Apparatus In this investigation I shall need: * A piece of constantan wire, longer than 100 cm * Two ammeters, both analogue and digital * Two voltmeters, both analogue and digital * A power pack * A 100 cm ruler Diagram [IMAGE] Method The apparatus was set up as shown in the diagram. Although

to hit and vice versa, if the length is short there will be less particles to be hit. Therefore the resistance will increase when the length is longer and decrease when it is shorter Preliminary experiment: In this experiment we used constantan wire to keep the test fair. We done this to find out the range of lengths we could use. For an accurate result we decided that the amps had to be over 0.2 and the voltage fewer than 6. These were the main results I collected Length of wire

working out the resistance with ‘Ohms Law’. Ohms law is, V= IR. For my experiment I will have to re-arrange this to get the resistance, so it is R= V/I. Equipment - Power Pack (set to 5 volts) - Circuit wires - Crocodile clips - Constantan wire (x4 at different SWGs) - Ampmeter - Voltmeter - Rheostat (Variable resistor) Goals * I plan to collect evidence using my method(below) * I plan to use 4 different wires * I plan to get a few results and find an average

[IMAGE][IMAGE] List of Apparatus: · Ammeter · Variable resistor · Constantan wire · Connecting wires · Power pack I connected the above apparatus in series, using the connecting wires. Below is a circuit showing this connection. Below are samples of the wires I used: Thick wire: Fairly thick wire: Thin wire: Fairly thin wire: Method: I connected the power pack, ammeter, variable resistor and the constantan wire in series using the connecting wires. I then set the ammeter

investigation to also obtain this resistance. Introduction As mentioned in the previous page, an electrician wants two resistances: 1.9 ohms and 28.5 ohms. I am to find out how to do this. I will be provided with different reels of wire of constantan, each reel having a different diameter. I will, for three different diameters, find the resistance of the wire at different lengths. For example, I will take the 24 gauge wire (0.56mm diameter) and find its resistance when it is at 100cm, 80cm

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

a length of constantan (28 SWG) wire spread over a metre rule, a power supply, approximately 7 connecting wires, 2 crocodile clips and 2 multi-meters which can be used as voltmeter and ammeter functions. The connecting wires will be connected to the power supply and the 2 crocodile clips. The multi-meters will be put into the circuit and current will flow straight through while being read. The two crocodile clips will be the receptors as they will be attached to the constantan wire and will

Investigating the Resistance of Wires Aim: To investigate how the diameter of a constantan wire will affect its resistance and hence the current flowing through it. Prediction: I predict that the thicker the diameter the less resistance there will be. Reason: In a metal, some of the electrons are free to move between the ions, to form a "sea" of electrons around the positive metal ions. Metals that are good conductors have more "free" electrons and therefore these electrons

need to keep constant in this experiment are: 1. Thickness of the wire. 2. Length of the wire 3. Input of voltage coming from the power supply should be kept constant. 4. Temperature of wire should be kept constant. Firstly if the constantan wire was increased then the resistance will be less. Thin wires have more resistance than thick wires. Secondly if the length of the wire got longer then the resistance is greater than a short wire. Thirdly if resistance increases and the wire

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 out the resistance. I will be using constantan wire starting of with 1m length and then decreasing it by 0.10m intervals down to 0.20m long. I will not go above 1m or below 0.20m because it may be too long that they resist so much current that the wire burns, or the length of the wire is

same at all times, adjusts using the variable resistor) 5) Repeat 3 times for each length of wire and find the average. 6) Then work out the resistance using the formula V÷I=R (Voltage ÷ Current = Resistance) Apparatus Power Pack Constantan wire Leads Voltmeter Ammeter Crocodile clips 1-meter ruler Variable resistor Fair test: To make this fair test I kept some of the things constant. Variables kept constant are the temperature (did experiment on the same day)

ions more often in a longer wire, and would slow the current. I predict the shorter the wire, the less resistance caused to the current. There would be less electrons colliding, and would increase the current. Method: Apparatus: 110cm constantan wire Crocodile clips Voltmeter Ammeter [IMAGE]1-meter ruler Connecting wires Power pack [IMAGE] [IMAGE] [IMAGE] Longer Wire [IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE]

Resistance through Wire We are using constantan wire to check the resistance thought wire; our variant is going to be the different length of wire. We choose this because it seemed like an interesting variant and it might proof to me that in certain cases it would be more acceptable and also safer to use for example a longer piece of wire rather then a smaller one. To do our experiment we will use the following apparatus · Power pack · Constantan wire · Amp meter We as a group