Experiments 12 on RC Circuit - General Physics Laboratory II | PHYS 1102, Lab Reports of Physics

Download Experiments 12 on RC Circuit - General Physics Laboratory II | PHYS 1102 and more Lab Reports Physics in PDF only on Docsity! PHYS 1102 Exp 12 RC Circuit 4. We now have the curve for the voltage of the capacitor as it charges. Right click on the Potential column, select Column Options then Latest: Potential. Change both, the Name and Short Name of the column to Vc. 5. We can now calculate the value of the capacitor. First, remember that for this case the potential difference across the capacitor is given by ( )RCtC eVV /0 1 −−= , where V0 is the voltage recorded at the end of Step 1. Show this equation can be written as RCt V VC /1ln 0 −=      − . Create a graph of ln(1- VC/V0) as a function of time. On the top of the screen menu, go to Data and select New Calculated Column. Type LV for both the Name and Short Name. Under Equation type ln(1- “VC”/V0), where V0 is the actual number recorded for Average V+ and “” indicates that variable enclosed is a column. Notice that we have renamed ln(1- VC/V0) as LV. To plot the graph of LV vs Time go Insert to and select Graph in the top menu. Right click on the new graph and select Cartesian Graph Options and give a title to your graph, include your Station number. Identify the region in the graph where the capacitor was charging. Calculate the slope of the graph within this region. To do this click on the graph to select the desired region then go to Analyze and select Linear Fit. To print your graph select File, Print Graph. Slope = _________ From equation RCt V VC /1ln 0 −=      − identify what does the slope of the graph represent? Slope represents ___________________.