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Transformer efficiency.

  • #1

Homework Statement


What is the the efficiency of a transformer with 13w of primary power.
120Vp, Np unknow
12Vs, 90Np

Homework Equations





The Attempt at a Solution

eff= Psec/ Pri * 100

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
5
120Vp, Np unknow
12Vs, 90Np

In first line you say Np is unknown and second line you say Np = 90. which is correct?
 

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