What is the mechanical device that generates electricity using wire loops rotating in a magnetic field?

The mechanical device that generates electricity by utilizing wire loops rotating in a magnetic field is known as an electric generator. This device works on the principles of electromagnetic induction, where the movement of conductive wire through a magnetic field induces an electromotive force (EMF) in the wire, generating electric current.

In an electric generator, the wire loops—often in the form of coils—are rotated within a magnetic field, typically produced by magnets or electromagnets. As the loops cut through the magnetic field lines, a voltage is induced across the wire loops. If the loops are connected to an external circuit, this induced voltage drives an electric current, thus converting mechanical energy (from the rotation) into electrical energy.

Other options are not relevant to the specific function of generating electricity in this manner. For instance, an electromagnet refers to a magnet for which the magnetic field is produced by an electric current, while electrolytes are substances that conduct electricity when dissolved in water. Electrical energy is the form of energy resulting from electric charge flow but does not pertain to the machinery or process of generating it.