What factors effect the resistance of conductors

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Investigation 1 - Resistance

What factors effect the resistance of conductors

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Plan:

The task of this investigation is to find out the factors that affect the resistance on conductor. This will be done by performing experiment that try and investigate different proposed factor and to see whether they affect the resistance.

        There are many factors that affect the resistance of an object. It is determined by the nature of the substance of which it is composed known as the resistivity, the dimension of the object include the surface area of the wire conductor and the length of the conductor. (Advanced physics, 4th addition by Tom Duncan)

        The factors that will be investigating will be the type of material, the cross-sectional area and the length. The reason I am not going to investigate temperature is because it is difficult to measure the temperature within a wire. (Martin)

        Ohm's law says that the amount of current flowing in a circuit made up of pure resistance is directly proportional to the electromotive force impressed on the circuit and inversely proportion to the total resistance of the circuit. The law is usually expressed by the formula I =V/R. Where I is the current in Ampere, v is the electromotive force in volts and R is the resistance in ohms. This enables us to work out the resistance using the current and voltage. (G C S E grade booster by Schofield and Sims Ltd)

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Prediction:

In this experiment, I expect that the resistance or why you depends upon

  1. Its length - the greater the length, the greater the resistance.
  2. Its cross-sectional area - the greater the area the less the resistance (GCSE physics by C. Boyle)

My prediction is that the length of the wire will be directly proportional to the resistance. I will make this experiment fair by performing investigation and each period ball at a time as not to forget the variable mixed up. For suitable results, I shall have to control the temperature in order to ...

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