The power usage (P = (E^2)/R) of a strip heater is to be determined by measuring...

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Physics

The power usage (P = (E^2)/R) of a strip heater is to bedetermined by measuring heater resistance and heater voltage dropsimultaneously. The resistance is to be measured using an ohmmeterhaving a resolution of 1 Ohm and an error stated to be within 1% ofits reading, and voltage is to be measured using a voltmeter havinga resolution of 1 V and a stated error of 1% of reading.
It is expected that the heater will have a resistance of 100 Ohmand use 100 W of power. Determine the uncertainty in powerdetermination to be expected with this equipment at thezeroth-order level (i.e. ignoring the individual instrumenterrors). Also, recompute the uncertainty at the design stage.

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AnswerHere P E2R and error of voltmeter reading 1 error of ohmmeter reading 1 as given in the question Alsoleast count value resolution of the voltmeter 1 V leastcount value resolution of the ohmmeter 1 ohm are given in thequestionThe uncertainty in power determination to be See Answer

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