Which term describes the comparison of the number of turns in the primary and secondary coils?

• A. Turns ratio
• B. Voltage ratio
• C. Current ratio
• D. Flux ratio

Answer: (A)

Turns ratio is the comparison of the number of turns in the primary and secondary coils. In an ideal transformer, the voltages relate to turns as V_p/V_s ≈ N_p/N_s, so the turns ratio directly describes how the coil turns scale the voltage. It’s the term that explicitly captures the count relationship between the windings. The voltage ratio describes how voltages compare (derived from the turns), the current ratio describes how currents compare (inversely related to turns in an ideal transformer), and flux ratio isn’t used because the magnetic flux in the core is effectively shared by both windings.