How the length of a wire affects its resistance in my physics coursework i am going to investigate the effect of the length of a wire on its resistance resistance is the measure of how easy it is for current to flow through a wire. Resistance of a conductor will decrease if its length and temperature remain constant method wire lengths (independent variable) of 20 cm, 40 cm, 60 cm and 80 cm were used. Key elements that affect the payback, and thus the economic incentive, to install larger wire gage, are the duty cycle, load factor and electricity price when using the same size conduit, the increased cost of wire is minimal. Resistors control how much electric charge flows through a circuit each second - the size of the current in the circuit they do this by controlling how difficult it is for electric charges to flow in the circuit - that is, the resistance in the circuit. The resistance increases when the length increases because current has to travel more and as a wire is a conductor, it absorbs electricity in it, thus current consumption is more source(s): my mind.
Originally answered: how does the resistance of a wire depend on its length there is a formula which defines the resistance (r) of a wire which is defined r = pl/a p is the specific resistance of the wire material, l is the length of wire and a area of cross section of wire. 2 - the length of the wire in the test fixture is unimportant in 4-wire measurements since the lead wire is not part of the resistance measurement 4-wire methodology may be especially advantageous when the uut is 'remotely' located. Effect of wire length on bulb brightness sam meyers when does cable length matter - duration: 6:48 resistance of a wire length - duration:. In the same way, a long, thin copper wire has higher resistance (lower conductance) than a short, thick copper wire materials are important as well a pipe filled with hair restricts the flow of water more than a clean pipe of the same shape and size.
How does the length of a wire affect its the aim of the investigation is to find out if there is a link between the thickness of a wire and resistance in a circuit. Long runs of wire encounter a variable that you may not have considered, resistance even though the copper wire is a very good conductor , it does have some resistance that causes heat heat does damage, not only to the extension cord itself, but also the power tools connected to them. An ldr changes it's resistance depending on how much light there is eg: in bright light the resistance falls in darkness, the resistence is highest thermistor( tenperature-dependent resistor) a thermistor is similar to an ldr but it's resistance depends on temperature eg: in hot conditions the resistance drops in cool conditions the resistance goes up there are some factors that affect the.
How temperature changes resistance although the resistance of a conductor changes with the size of the conductor (eg thicker wires have less resistance to current flow than thinner wires), the resistance of a conductor also changes with changing temperature. Then the resistance of the circuit is independent of the wire length but linear in the number of connected segments of this unobtanium wire - carl witthoft jul 16 '14 at 18:29 1. Factors that affect the resistance of a wire the resistance of an object is a measure of the how reluctant current is to flow through that object it is given the symbol r and has the unit w (which is a greek letter omega and pronounced 'ohm'.
Investigation: how does the length of a conductor affect the resistance of the conductor hypothesising, identifying variables, following instructions, drawing, observing, describing, analysing, concluding. One effect of this resistance, also called impedance, is a loss of voltage this is known as voltage drop and is represented as a percentage of the total voltage supplied at the power source of the circuit. A piece of thin wire has higher resistance than a piece of thicker wire with the same length, which means that it's harder for electric current to move through it if you use the same battery but replace a thick wire with a thinner one, the electric current will get smaller and a light bulb in the circuit should get dimmer. The probable answer is that nothing happens to the voltage increasing the length of the wire will increase the resistance of a circuit which will reduce the current but has no effect on the voltage. For example, when the length of the wire is 20cm the resistance is 314 ohms when the length of the wire is 40cm the resistance is 618 ohms, which is roughly double in my main investigation i will see if this observation applies to my results.
In my physics coursework i am going to investigate the effect of the length of a wire on its resistance resistance is the measure of how easy it is for current to flow through a wire current is the rate of flow of charge through a conductor, and it is measured in amps using an ammeter. The resistance of a typical conducting wire is low when temperature is low and high when temperature is high the increase in resistance alongside temperature is due to an increase in energy of the wire atoms, which cause them to vibrate more and impede the path of the electrons flowing through. If the wiring run is very long, the resistance of the wire (all wire is resistive to a degree) and thusly the temperature of the wire will increase if that temperature rises above a wire's insulation rating, it could melt causing a short or worst case, start a fire in the surrounding building materials.
Does electricity move better through thick wires or thin ones ib physics investigation does the cross sectional area of a wire resistors science learning hub. Voltage something you provide the length of the wire cannot affect that but the length of the wire does affect the resistance offered by the wire and so, longer the wire, lesser the current that can pass through it for the same amount of voltage provided. Like the resistance to water flow, the total amount of resistance to charge flow within a wire of an electric circuit is affected by some clearly identifiable variables first, the total length of the wires will affect the amount of resistance.