Why armature coil in ac generator made of hard iron?

The armature coil in an AC generator is made of hard iron to enhance its magnetic properties, allowing it to produce a stronger magnetic field and improve overall efficiency. Hard iron has high permeability, which means it can easily become magnetized and demagnetized, facilitating better performance during the alternating current generation process. Additionally, the use of hard iron helps to minimize energy losses due to hysteresis and eddy currents, ensuring more effective conversion of mechanical energy into electrical energy.