In a transformer, what is the function of the secondary winding?

In a transformer, the secondary winding plays a crucial role in the operation of the device by supplying energy to the load device. When an alternating current (AC) voltage is applied to the primary winding, it generates a magnetic field that induces a voltage in the secondary winding due to the principles of electromagnetic induction. This induced voltage can either increase or decrease depending on the turns ratio of the transformer, thus allowing the transformer to step up or step down voltage levels.

When the secondary winding delivers this output voltage, it is connected to a load device, which could be any electrical component or system that requires power, such as lights, motors, or electronic devices. The energy supplied by the secondary winding is the transformed electrical energy that the load utilizes to perform its functions.

The other options do not accurately describe the function of the secondary winding. For instance, it does not serve as an input to the power line nor does it convert AC to DC voltages directly. Additionally, while it may seem like the secondary could store energy, this is not its intended function; transformers are designed primarily for energy transfer rather than energy storage.