To investigate how increasing the voltage can affect the flow of current.

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Sophie Wilson 11H2

Physics coursework

Aim: - To investigate how increasing the voltage can affect the flow of current

Prediction: - I predict that the higher the voltage the higher the current. If we feed more energy to the coulombs they will push the current around the circuit faster. In order to arrive at this prediction I used the watering can analogy to help me. I.e. I am walking around my garden with a watering can full of water in my hand and the plants I wish to water are at the end of my garden. I represent the Voltage. The watering can represents the coulombs and the water represents the current. I (the voltage) am carrying/pushing the watering can (coulombs) around the garden (circuit). As I am carrying/pushing the watering can (coulombs) around I am pushing the water (the current) around. The faster I walk (the higher the voltage) the quicker the water gets to the plants (the faster/higher the current is).

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Method: - In order to carry out this investigation I am going to construct a simple circuit in which there will be a voltmeter allowing me to vary the voltage, and an ammeter allowing me to measure and record the current. I will start the voltage at 0V and will increase the voltage in steps of 0.5V, i.e. 0V, 0.5V, 1V etc. At each stage I will record the current alongside the corresponding voltage. I will repeat this experiment three times then will find the average of the results. In order to make this a fair test I will keep ...

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