Lab217 - RC Circuits

Lab217 - RC Circuits - Samuel Dzifanu Lab 217 RC Circuits...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Samuel Dzifanu Lab 217: RC Circuits RC Circuits Name : Samuel Dzifanu Objective: To observe and analyze the voltage as a function of time across a capacitor in a circuit containing a resistor and capacitor connected in series. Theory: When a capacitor is charged through a resistor by a DC voltage source, the charge in the capacitor and the voltage across the capacitor will increase with time. The voltage V as a function of time t is given by: V(t) = Vs(1 - e^(-t/RC)) and the charge: q(t) = qMax(1 - e^(-t/RC)) with the exponential e = 2.718 as the base of natural logarithm and Vs as the voltage of the source . The quantity RC = τ (Tau) is known the time constant . The curve of the voltage rises during the charging process. At time t = τ =RC (one time constant), the voltage across the capacitor has grown to a value: V (t = RC) = V (1- e^-1 ) = V (1- 1/e) = 0.63 and after 5 time constants (5RC) the capacitor is almost fully charged with its voltage almost equal to the supply voltage (99.3%). We can reasonably say that the capacitor is fully charged after 5RC, although really charging continues for ever (or until the circuit is changed).
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern