{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ACPhasors - Alternating Current and Phasors AC voltage from...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Alternating Current and Phasors AC voltage from a wall outlet is a sinusoid with an amplitude of about 170 volts and a frequency of 60 hertz (377rad/s). The electrons are not actually traveling in a loop through the transmission lines, but instead are simply vibrating back and forth in the wire. The voltage in an outlet is normally given as 120V. This is the root-mean-squared voltage, a kind of average where the square r oot of the integrated m ean of the voltage s quared is taken. (A simple time average would be zero.) For sine waves, the RMS value is always V RMS =V max / 2 . In this case, 170/ 2 120 . A phasor is a mathematical construct similar to a vector. Using phasors to solve AC circuit problems is much easier than trying to process all the calculus and trigonometry involved with straightforward sinusoidal values and circuit-element behavior. A phasor consists of a magnitude and a phase angle that are both straightforward to determine.
Image of page 1
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