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To prove ohms' law, and to study the relationship between current and potential difference (voltage).
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12/3/2001 Ohm's Law Manaf Khatib Aim: To prove ohms' law, and to study the relationship between current and potential difference (voltage). Hypothesis: The current flowing through a metal wire is proportional to the potential difference across it (providing the temperature is constant). Apparatus: 1. Power Supply 2. Variable resistor 3. Ammeter 4. Voltmeter 5. Resistors 6. Electric wires Diagrams: R1: R2: R1 + R2 (in series): R1 + R2 (in parallel): Method: 1. Set up the apparatus 4 times as shown in the diagrams above 2. Set the power supply to 6v 3. Set the variable resistor to maximum resistance 4. Switch on the power and note the ammeter and voltmeter readings 5. Reduce the resistance of the variable resistor 6. Repeat steps 4, and 5 until at least five 8 sets of readings have been obtained 7. Change the setting of the apparatus as shown in the diagrams above, and perform steps 2 - 6 with each setting of apparatus Results: * Table of results for...
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