Lab Report Resistance 31/8/23
Background Research : According to Ohms law Voltage in a circuit is
directly proportional to the current in that circuit
Aim of Experiment : to prove that ohms Law is true
Precautions taken : We used low voltages to prevent electric shocks,
used insulated wires and only touched the insulated parts of the
apparatus
Apparatus :
1.
2.
3.
4.
5.
Multimeter
Variable resistor
Battery eliminator
Wires
Voltmeter
Procedures :
1. Connected a battery substitute to replace the battery in the circuit.
2. Arranged a tool called a voltmeter to check how much electrical push
(voltage) is across the adjustable knob in the circuit.
3. Set up multimeter, to act as a current-measuring device.
4. Checked the current at speci c levels of voltage by changing the
knob's resistance gradually.
5. Did this current measurement process twice for accuracy
6. Found the average of the two sets of current measurements to get a
reliable value.
7. Made a graph with voltage on one side and current on the other,
using the data collected.
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8. Used the formula (Resistance = Voltage / Current) to nd resistance
9. Found gradient of graph to calculate average resistance
Readings and Graph
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Conclusion : The graph clearly shows that as voltage goes up, current
also increases, con rming Ohm's Law and our correct resistance
calculations.