If we make an electromagnet by winding 3000 turns on 5-inch-long cast iron bar, and provide 12V and 2A of current, it will produce the magnetic field with certain magnitude.

The question is: If we increase the weight of the objects being lifted by that electromagnet, will it consume more current? If we lift much smaller weight by that electromagnet, will it use lesser current?

The question is: If we increase the weight of the objects being lifted by that electromagnet, will it consume more current? If we lift much smaller weight by that electromagnet, will it use lesser current?