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  3. the electrical power dissipated in a resistor is measured directly...

Question: the electrical power dissipated in a resistor is measured directly...

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The electrical power dissipated in a resistor is measured directly using a wattmeter and is to be compared to the electrical power determined indirectly using the equation P- RI, where R is the resistance measured by an ohmmeter and I is the electric current measured by an ammeter. You are provided with the following uncertainty information: 0.2 A +3% Resistance measurement relative uncertainty, AR/R Wattmeter power measurement uncertainty, AP 1% of fullscale, where full Pax 4000 w Derive the equation for the uncertainty,AP, in the indirect power measurement and type your derivation in a MS-Word document using Equation editor. Follow the guidelines for equations specified in the laboratory report handout, including equation numbers and transition sentences (think of this as being akin to a typed theory section in a lab report). a. b. Using the MS-Excel spreadsheet that was provided to you on Moodle with this homework assignment, do the following: i. Calculate the indirect power, P (in Watts), for each data point and determine the indirect and direct power uncertainties, AP and APd (in Watts). Also determine the % relative uncertainties for both the indirect and direct power measurements. Use Excel formulas to calculate your numbers. Include a copy of your Excel sheet with your homework. Generate a table in your MS-Word document using the values calculated in part (i). Make sure you include a table number and title and follow the table format guidelines specified in your lab report handout. Plot the indirect (calculated) power versus the direct (measured) power. Insert error bars and a 45 degree line (y x) in your graph. Format the plot following the figure format guidelines specified in your lab handout and include it in your MS-Word document. Make sure you include a figure number and title. Upload a copy of your Word document and Excel spreadsheet to Moodle using the provided assignment link. ii. iii. iv.
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