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I am doing an Ohm's law lab where there is a variable source, a fixed resistor, a voltmeter across the resistor, and an ammeter in series with the resistor.

The fixed resistor is an unknown value but has a tolerance of 5%

You need to figure out its value by plotting Voltage VS Current and the slope of the graph is resistance.

My question is....I need to add error bars to the graph but I don't know where to put them...the x-axis is current and the y-axis is voltage, so would I put X-error bars of 5%, or Y-error bars of 5%, or both?

My guess is that since the resistor has tolerance of 5%, and resistance depends on Voltage and current, both x and y axes need to have 5% error bars

Thanks,

Anton.

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# Homework Help: Resistor Tolerance/Error

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