Heating, Ventilation, and Air Conditioning (HVAC ) Electrical Practice Test

The output voltage of a transformer can be determined using the turns ratio formula, which is based on the relationship between the number of turns in the primary coil and the secondary coil. The formula is:

\[

\frac{V_s}{V_p} = \frac{N_s}{N_p}

\]

Where \(V_s\) is the secondary voltage, \(V_p\) is the primary voltage, \(N_s\) is the number of turns in the secondary coil, and \(N_p\) is the number of turns in the primary coil.

In this case, the primary coil has 1,000 turns and the secondary coil has 2,000 turns. The primary voltage is given as 120 volts. Plugging the values into the formula gives:

\[

\frac{V_s}{120 \, \text{volts}} = \frac{2000 \, \text{turns}}{1000 \, \text{turns}}

\]

This simplifies to:

\[

\frac{V_s}{120} = 2

\]

To find the secondary voltage \(V_s\), multiply both sides by 120:

\[

V_s = 2 \times 120 =