Soln10 - AC Circuits

Soln10 - AC Circuits - 8B Worksheet Answers 10 AC Circuits...

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

View Full Document Right Arrow Icon
8B Worksheet Answers 10. AC Circuits 1. For this problem, Graph A represents I R ( t ), and the battery has a frequency of 398 Hz. This frequency is the f of the problem, but our formulas will typically use the angular frequency , ω . The relationship between f and ω is ω = 2 π f = 2500 Hz. a) i) The potential and current are in phase across a resistor, so Graph D best represents V R ( t ). ii) This is a series circuit, so the current is the same everywhere throughout the circuit. Therefore, Graph A best respresents I C (t). iii) The potential difference across a capacitor lags the current by a quarter-period (or by π /2, or by 90 ° , depending on how you prefer to express these things!). Therefore, Graph B best represents V C ( t ). b) X C = 1 / ω C = 40 Ω c) Z = R 2 + X C 2 = 50 Ω d) I rms = V batt,rms / Z = 0.24 A e) i) V R,rms = I rma R = 7.2 V ii) V C,rms = I rms X C = 9.6 V f) The answers don’t add up because the two voltages are not in phase. 2. For this problem, Graph A represents I R ( t ), and the battery has a frequency of 398 Hz.
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