<p>An a.c voltage&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>v</mi><mi>i</mi></msub></math>&nbsp;= 140 sin(100<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#960;t</mi></math>) V is applied to the primary coil having 200 turns, of an ideal tranformer and it supplies a power of 5 kW. If the secondary coil has 1000 turns find:</p>

<p>(a) the output voltage,</p>

<p>(b) the instantaneous voltage across the secondary coil, and</p>

<p>(c) the current in the secondary coil (Take&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>2</mn></msqrt></math>&nbsp;= 1.4)</p>