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How does current vary with voltage in a light bulb? Preliminary Investigation Before I start the experiment I have carried out some research into Resistance, Voltage, Current and the history on Goerge Ohm. Resistance In the metal inside of a wire the molecules are compact. Then when the current passes through it, it heats up the wire due to the electrons rubbing against the molecules in the wire when they either collide or skim past the molecules that are in the wire the higher the voltage is the more energy that is given to each electron so the faster it goes and the more friction it creates. So the electron's that are trying to pass through the wire at tremendous speed hit the vibrating molecules and slow the electrons down. Therefore the greater the vibration is greater the chance there is of the electrons getting slowed down. This is called resistance. Some metals are more...

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