Length affects the resistance

Aim: The aim of my probe is to investigate how continuance affects the guard of a length of cable The resistance of a electrify depends on authentic factors. Some of these variables are listed below: * farness of wire * Diameter of wire * Temperature at which wire is at * The material of which wire is made out of * The voltage struggle across circuit * Cross sectional area These must be kept constant (except the length of the wire). The three major factors are explained bellow: 1) Temperature When the temperature of a coat increases the resistance of that metal increases. This is because when the temperature increases the atoms of the metal vibrate to a greater extent vigoursly because of the increase in talent. This mean that the electrons gift more(prenominal) difficulty knowting through the wire as they collide with the atoms which are in their pathway. This increases the amount of collisions because in that respect is more resistance. However it is har d to keep the temperature barely the akin as the agency temperature might change from twenty-four hours to day. It is demand to use a low voltage because it center a low current that will not light up the wires. If a high voltage is used the energy would be in form of heat which would make the look into unfair. The investigation will be done at room temperature. The temperature cannot be investigated because it is hard to control the range of temperature needed without the enlighten apparatus. 2) Length of wire The larger the length of the wire, the larger the resistance. This is because there are more atoms from the metal so there is more incident that the electrons would collide with one of the atoms therefore there is more resistance. The length of wire will be variable... If you want to get a full essay, order it on our website: BestEssayCheap.com

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