1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Transformer efficiency.

  1. May 3, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the the efficiency of a transformer with 13w of primary power.
    120Vp, Np unknow
    12Vs, 90Np

    2. Relevant equations



    3. The attempt at a solution eff= Psec/ Pri * 100
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 4, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    120Vp, Np unknow
    12Vs, 90Np

    In first line you say Np is unknown and second line you say Np = 90. which is correct?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Transformer efficiency.
  1. Transformer efficiency (Replies: 2)

Loading...