NORMINV() and RAND() to calculate a random value of. Repeat the calculation 500 times.įor each of 500 values of the slope calculate a value of. Use the function NORMINV() and RAND() to calculate a random On a new page in your spreadsheet enter your value of the slope and its uncertaintyįrom your linear fit. The relationship of the slope (m) is that it is the inverse of the time constant.
What is the relationship of the slope or intercept to the the time constant? What are the values of slope and intercept with their respective uncertainties? Perform a linear fit to your linearized variables using LINEST(). Give the file a name you recognized like your NetID_RC_discharge. In Capstone click the menu ”File.” Choose “Export Data.” Select the “Save as type” CSV. In Capstone click the menu “Display.” Choose “Copy Display” and paste into report. What kind of mathematical formula (model) describes the voltage across the capacitor?Īn exponential formula (model) describes the voltage across the capacitor.Voltage decreases over time at a nonlinear (exponential) rate. When the red wire is removed from the PASCO 550, the WhenĬonnected, the voltage increases, spikes to ~5V and stays constant for the time The voltage is zero before the red wire is connected to the PASCO 550. Does the voltage remain constant or does itĬhange with time? Is it increasing or decreasing? Is it changing in a linear or nonlinear This explains the equationĭescribe the voltage across the capacitor before and after the red wire to the PASCOĥ50 is connected then disconnected. You calculate this using the capacitance ( F ) of the capacitor and resistance ( ) of the resistor. The time constant value measures how long it takes for voltage to return to its original value. What will you measure to determine the time constant of a RC circuit? The time it takes for the voltage of the neuron to return to its original value is known as a time constant. When the membrane potential decreases after being stimulated, it’s representative of the red wire being pulled out of the PASCO 550 a few seconds later. When the neuron is stimulated, it’s like the red wire being plugged into the PASCO 550. The neuron is comparable to to a RC circuit because energy is stored in the neuron through the motion of sodium Na+ and potassium K+ ions. Paste the screenshot into your report.ĭescribe how a RC circuit is a model of a neuron? What parts of the RC circuit Take a screenshot of the neuron simulation with the Potential Chart of Membrane