Ham Amateur Radio Technician 2025 – 400 Free Practice Questions to Pass the Exam

To determine the voltage output of a transformer, we can use the transformer turns ratio formula, which relates the number of turns in the primary coil (input side) to the number of turns in the secondary coil (output side). The formula is:

\[ V_s = V_p \times \frac{N_s}{N_p} \]

Where:

- \( V_s \) is the secondary voltage,

- \( V_p \) is the primary voltage,

- \( N_s \) is the number of turns in the secondary,

- \( N_p \) is the number of turns in the primary.

In this case, the primary coil has 500 turns (N_p), and the secondary coil has 1500 turns (N_s). When 120 VAC is applied to the primary (V_p), we can plug the values into the formula:

\[ V_s = 120 \, V \times \frac{1500}{500} \]

Calculating the turns ratio:

\[ \frac{1500}{500} = 3 \]

Now, substituting back into the formula:

\[ V_s = 120 \, V \times 3 = 360 \, V \]

Thus, the voltage output of the