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MYP Physics Practical - Current and Voltage Aim: To find the relationship between the current through a resistor and the voltage across it. Apparatus: Power pack, Leads, Ammeter, Voltmeter, Resistor (Nichrome Wire) Method: Assemble the circuit shown above. Vary the emf of the power pack from 0 to 12 Volts. Measure the current on the ammeter and voltage on the voltmeter for each value of emf. Data Collection: Thin Nichrome Wire EMF Current (Amperes) Voltage (Volts) 0 0 0 2 0.15 1.75 3 0.27 2.5 4 0.38 3.25 5 0.5 4.25 6 0.6 5 8 0.85 7 10 1 9 12 1.2 10.5 Medium Nichrome Wire EMF Current (Amperes) Voltage (Volts) 0 0 0 2 0.38 1.6 3 0.5 2.4 4 0.8 3.2 5 1 4 6 1.2 5 8 1.6 6.5 10 2 8.5 12 2.35 10 Thick Nichrome Wire EMF Current (Amperes) Voltage (Volts) 0 0 0 2 1.3 1.25 3 2 1.75 4 2.65 2.5 5 3.4 3 6 4.1 3.6 8 - - 10 - - 12 - - Data Processing: Conclusion: From the three graphs above it can be seen in all of them that there is a firm relationship between the two factors, one being voltage and second one being current. Therefore I have accomplished my aim, as I have found what is the relationship between the current through a resistor and the voltage across it. The relationship as can be seen from the graph is positive, and thus directly proportional. This can be seen from the...

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