Question 312218
A transformer has a primary voltage of 480 volts and a secondary voltage of 120 volts. If the primary windings have 700 turns, how many turns are in the secondary windings? (Voltage and number of turns are directly proportional.)
<pre><b>
{{{V[S]/V[P]=N[S]/N[P]}}}

{{{120/480=N[S]/700}}}

Cross multiply:

{{{480N[S]=120*700}}}

{{{480N[S]=120*700}}}

{{{480N[S]=84000}}}

{{{N[S]=84000/480}}}

{{{N[S]=175}}}

Edwin</pre>