How the length of constantan wire affects the ressistance in a electrical circuit

... Aim - The aim of this investigation is to find how the length of constantan wire affects the resistance in an electrical circuit Introduction - Resistance is a measurment of current in which a object has difficulty going thorugh, the unit it is measured in is ohms. The job of the resistance is to make it hard for the electros to move. The resistance of an object is comfirmed by the potential diffrence across the object. In metals atoms are found in the outer shell of the electrons the electrons are known as delocalised electrons. These electrons are free to manouver creating the metal to be a conductor, but when a potential difference (voltage) is applied it ables the electrons move. The larger the cross section of the object the more the electrons, thus the increase rate of current, so there will be a low amount of resistance. The longer the

want to read more? →