<p>A transformer of 100% efficiency has 200 turns in the primary and 40,000 turns in the secondary. It is connected to a 220V a.c. mains and the secondary feeds to a 100<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>k</mi><mi>&#937;</mi></math>&nbsp;resistance. Calculate the output potential difference per turn and the power delivered to the load.</p>