Final answer:
When an object is placed in the field of a strong electromagnet connected to an AC line, it can be attracted or repelled depending on the polarity of its magnetic field.
Step-by-step explanation:
When an object is placed in the field of a strong electromagnet connected to an AC line, the object will be attracted or repelled depending on the nature of the object. When an object is placed in the field of a strong electromagnet connected to an AC line, it can be attracted or repelled depending on the polarity of its magnetic field.
The interaction between the object and the magnetic field is determined by the polarity of the object's magnetic field and the electromagnet's magnetic field. If the object has a magnetic field that aligns with the electromagnet's field, it will be attracted. If the object's field opposes the electromagnet's field, it will be repelled.