Mahua is investigating the effect of increasing resistance on power delivery in series circuits. She connects an ideal cell to an increasing number of resistors, each having equal resistance. Each time Mahua connects another resistor, she records the current through the circuit once and proceeds with adding the next resistor. Explain how a change to Mahua’s experiment could decrease the effect of random error on her results.
Question
Mahua is investigating the effect of increasing resistance on power delivery in series circuits. She connects an ideal cell to an increasing number of resistors, each having equal resistance. Each time Mahua connects another resistor, she records the current through the circuit once and proceeds with adding the next resistor. Explain how a change to Mahua’s experiment could decrease the effect of random error on her results.
Solution
One way to decrease the effect of random error on Mahua's results would be to take multiple measurements of the current for each resistor added, instead of just one. This would allow her to calculate an average current for each resistor, which would likely be a more accurate representation of the true current.
Another change could be to ensure that the resistors and the cell are at a constant temperature during the experiment. Temperature can affect resistance and current, so keeping it constant can help reduce random error.
Additionally, she could use a more precise instrument for measuring the current. The precision of the instrument can greatly affect the amount of random error in an experiment.
Lastly, she could also repeat the entire experiment multiple times and take the average of the results. This would help to minimize any random errors that might occur during any one run of the experiment.
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