In the filter circuits, the time constant of the circuit is given bySingle choice

A

RC

B

1/RC

C

6.284RC

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The time constant for capacitors states that

Again consider the RC circuit shown before Question #1.  An experiment was run and the resulting traces of the source voltage (yellow) and capacitor voltage (blue) are shown below.  The source voltage is a square wave of some frequency f and goes from 0 V to 2 V, then back to 0 V as you used in your Workshop #6.  It should be clear the capacitor voltage does not achieve steady state as it never reaches the source voltage.  Consider the possibility of changing the component values of R and C.   Which of the below choices regarding the change in R and C can help the capacitor's voltage get closer to achieving steady state:

Above is a screenshot of the scope screen in WaveForms from testing this circuit.  Channel 1 (yellow) is the source voltage, while Channel 2 (blue) is the voltage across the capacitor.  The vertical plot axis represents voltage, and voltage levels are labelled for you.  Note that the 0 V line has been moved lower so that a more zoomed in look of the signal can be seen.   The horizontal plot axis is time, but there are no time labels.  You are instead given that the Time Base is set to 50 us/div  (microseconds per division).  Similarly, the Range of both channels (as indicated in the image) is set to 250 mV/div.   STRONG SUGGESTION:  Right-click and save the scope screenshot and open it separately to get a better view.  Alternatively, here is a PDF version of the screenshot which is just as good as directly downloading the image:   CLICK there --> RC1.pdf Given that the resistor R = 500 Ω, estimate the numerical value of the capacitor C in the units of nanofarads. Your estimate needs to be very good.  There is a stringent range of acceptable correct values here.  This is why you should download the image.  Type the answer for your estimated C below where the units are  nF  (nanoFarads).  Do not type the units in, just the numerical value. 

Question textComplete the following protocol table for setting up your standard curve for protein. Remember, each of your standards, except the reagent blank, will be prepared in duplicate in the lab (i..e, you will make up each of these standards twice), giving you 11 standards. When filling in your answers, be careful with your formatting and note the following requirements: for all entries of concentrations, volumes and amounts in this table, include two decimal places (e.g. '1.5') for any decimal numbers less than one, make sure you precede the decimal point with the number zero (i.e. type in '0.2'; not '.2' without the zero) [table] Standard | Concentration of BSA standard | Volume of 20 mg/mL BSA stock solution required (mL) | Volume of 0.05 M NaOH diluent required (mL) | Amount of BSA present (mg) | Volume (mL) 1(reagent blank) | 0 | Answer 1 Question 6 | Answer 2 Question 6 | Answer 3 Question 6 | 0.8 2 | 4 | Answer 4 Question 6 | Answer 5 Question 6 | Answer 6 Question 6 | 0.8 3 | 8 | Answer 7 Question 6 | Answer 8 Question 6 | Answer 9 Question 6 | 0.8 4 | 12 | Answer 10 Question 6 | Answer 11 Question 6 | Answer 12 Question 6 | 0.8 5 | 16 | Answer 13 Question 6 | Answer 14 Question 6 | Answer 15 Question 6 | 0.8 6 | 20 | Answer 16 Question 6 | Answer 17 Question 6 | Answer 18 Question 6 | 0.8 [/table]

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