Which statement describes windings in a transformer?

Which statement describes windings in a transformer?

• A. They are magnetically coupled but not electrically connected
• B. They are part of the same coil
• C. They are directly connected with wires
• D. They are cooled by oil

Answer: (A)

Windings in a transformer are two separate coils that are magnetically linked through the core but electrically isolated from each other. When the primary winding is energized with AC, it produces a changing magnetic flux that threads both windings. This changing flux induces a voltage in the secondary winding, with the voltage proportional to the turns ratio, allowing energy to transfer without a direct electrical connection between the windings. Cooling oil, if used, helps remove heat but does not define the relationship between windings.

Windings in a transformer are two separate coils that are magnetically linked through the core but electrically isolated from each other. When the primary winding is energized with AC, it produces a changing magnetic flux that threads both windings. This changing flux induces a voltage in the secondary winding, with the voltage proportional to the turns ratio, allowing energy to transfer without a direct electrical connection between the windings. Cooling oil, if used, helps remove heat but does not define the relationship between windings.