No-load loss, also known as core loss or static loss, refers to the energy lost in a transformer or magnetic device when it is energized but not supplying any load (i.e., no current flowing through the secondary winding). These losses occur primarily due to two main factors: 1. **Hysteresis Loss:** This occurs due to the magnetization and demagnetization of the core material as the alternating current (AC) flows through the winding.
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