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Year 11 Resistance of a Wire Investigation

Posted: September 7, 2018

Resistors are put into electrical circuits to control the flow of current within the components of an electrical appliance.  Sometimes a resistor with a particular value of resistance has to be made.  For example, in order to give the right amount of heat, the heating element of a kettle must have just the right value of resistance.  What are the factors that affect the resistance of a conducting wire?  Students investigated how the length, diameter, or temperature of this wire affected its resistance to current when connected in circuit with a constant power source.