Final answer:
To produce voltage through electromagnetic induction, a conductive coil, a magnetic field, and a change in the magnetic field are required; these are described by Faraday's and Lenz's laws.
Step-by-step explanation:
The question concerns the principle of electromagnetic induction, which is a fundamental concept in physics. To produce voltage by the principle of electromagnetic induction, three things are needed: a conductive coil or wire, a magnetic field, and a change in the magnetic field over time with respect to the coil. When a coil of wire is exposed to a changing magnetic field, an electromotive force (emf) is induced in the coil which can drive an electric current if the circuit is closed. This is explained by Faraday's law of induction, which states that the induced emf is proportional to the rate of change of magnetic flux through the coil. Additionally, Lenz's law describes the direction of the induced emf and current, stating that it will oppose the change in magnetic flux that produced it.