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To Find the Value of an Unknown Resistor I will be making an experiment to find out the resistance of a piece of nichrome wire using. I will be using Ohm's law, which states that the current through a resistor is proportional to the voltage across the resistor providing that the temperature remains constant. Therefore, I will use the equation. Resistance= voltage current There are three things that affect the resistance of a resistor. * Increasing the length will give the current further to travel, which will increase resistance. * Increasing the cross-sectional area of the material will give the current more space to flow through and so reduce the resistance. * The material of the resistor also affects the resistance, because some materials are better conductors than others. I will carry out my experiment three times to give a more accurate final reading. I will also keep the temperature constant so that...

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