The step-down transfonner of Figure 14-8 has 14
turns on the primary, and 7 turns on the secondary; therefore,
the turns ratio is 2 to l, or just 2. The step-up
transformer has 7 turns on the primary and 14 on the
secondary; therefore, the turns ratio is 1 to 2, or 0.5. If
one voltage and the turns ratio are known, the other voltage
can be determined with Equations 14.2 or 14.3.