- Raw Data For Question 3 B Number Of Divisions Uncertainty 1 6 0 2 Div Time Per Division 3 Uncertainty 100 1 (141.15 KiB) Viewed 42 times
3. Connect the signal generator (set on square wave) to a resistor and capacitor in series so as to achieve the circuit of part 2 above. Set the voltage of the function generator to 1V and put C = 0.15 uF and R = 1000 2. Note: when set to this voltage the generator has an internal resistance of Ru=5202 a) Connect the oscilloscope across the capacitor. The bottom lead of the capacitor should be grounded (black). Turn on the scope and generator and adjust the Time/Div knob on the scope and frequency of the generator until a series of charging/discharging curves are seen. Make a rough sketch below of a charging/discharging cycle. b) Determine the time for the capacitor to discharge to 37% of its initial voltage. To increase the accuracy of your reading, attempt to get the largest picture possible. This can be accomplished by adjusting the voltage scale knob and the Time/Div knob. Note: it is not necessary to have the vertical axis calibrated, but the horizontal (time) axis must be calibrated. List your observations below and use them to find the time constant. c) Repeat part (b) for the charging part of the cycle. In particular find the time required to charge to 63% of its final voltage. Compare your result with that of part (b). d) How do your results to parts (b) and (c) compare with that expected from the resistances and capacitance in the circuit? Can you offer any explanations for the discrepancies?