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The no-load current characteristics of an electrical machine, such as a transformer or an induction motor, comprise of two main components:
1. Magnetizing Component (Im): This component is responsible for establishing the flux in the core. It is essentially reactive in nature, meaning it lags the applied voltage by 90 degrees. The magnetizing component is crucial for the operation of the machine as it creates the magnetic field necessary for the machine’s operation.
2. Core Loss Component or Iron Loss Component (Ic): This component represents the current required to compensate for the core losses in the machine. Core losses consist of hysteresis and eddy current losses in the magnetic material of the core. The core loss component is in phase with the applied voltage.
Therefore, the total no-load current (I0) is the phasor sum of the magnetizing component (Im) and the core loss component (Ic).
Answer: a
Explanation: There are 2 main components under the no load current. They are
Magnetizing current and Loss component of current.