Magnetism is defined as which of the following?

• A. Invisible force that can accomplish mechanical work by attraction and repulsion.
• B. The flow of electrons.
• C. A type of electrical resistance.
• D. The energy of a moving charge.

Answer: (A)

Magnetism is the invisible force produced by magnetic fields that can do mechanical work through attraction and repulsion. This captures how magnets pull on or push away on magnetic materials or current-carrying conductors, enabling motion or alignment without contact. The other ideas describe electric current (the flow of electrons), a property called electrical resistance, and the kinetic energy of moving charges—different concepts than the magnetic force itself. So the description of an invisible force that acts at a distance via attraction and repulsion is the best fit.