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!

Homework Help: Primary voltage and transformers

  1. Jun 17, 2010 #1
    Hi physics gurus

    1. The problem statement, all variables and given/known data

    What should the primary voltage be changed to in order to produce a secondary current of 10 A, given that the V / I ratios for the coils do not change?

    Current ratios that I have calculated so far are as follows:

    Np (200) Vp (1200) Is (15)
    Ns (40) = Vs (240) = Ip (3)

    2. Relevant equations

    If focusing on just the IpVp = IsVs ratio - then the solution would be...

    3. The attempt at a solution

    The primary voltage would be changed to 800 V according to my calculation, I would appreciated your advice.

    Cheers P
     
  2. jcsd
  3. Jun 17, 2010 #2
    Re: transformers

    Yes, you are correct
     
  4. Jun 17, 2010 #3
    Re: transformers

    Many thanks

    Cheers P
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook