Magnet 1 should be used to pick up a bunch of paper clips at a time.
Why is this correct?
This is correct because of the correlation between the quantity of coils within an electromagnet and its magnetic potency. As an electric current passes through a wire coil, producing the electromagnet, it generates a magnetic field. Augmenting the number of wire coils, or turns around the core, elevates the intensity of this magnetic field.
Consequently, amplifying the coils within an electromagnet heightens its magnetic strength. This enhancement enables it to attract and gather a greater number of paper clips or other magnetic items in comparison to an electromagnet with fewer coils.