What result occurs when the induced electromotive force (emf) is created in a coil by changing magnetic flux?

What result occurs when the induced electromotive force (emf) is created in a coil by changing magnetic flux?

• A. An electric current is induced through the coil
• B. A magnetic field is destroyed
• C. No effect occurs in the coil
• D. The current becomes constant

Answer: (A)

When there is a change in magnetic flux through a coil, an induced electromotive force (emf) is created according to Faraday's law of electromagnetic induction. This principle states that the electromotive force induced in a coil is proportional to the rate of change of magnetic flux through that coil. As a result, when the magnetic flux changes—either increasing or decreasing, or even fluctuating—it generates an electric current in the coil. The induced current flows in a direction that opposes the change in magnetic flux, a phenomenon described by Lenz's law. This interaction between the changing magnetic field and the induced current demonstrates the fundamental relationship between electricity and magnetism. Thus, the correct response reflects this essential principle of electromagnetic induction, confirming that an electric current is indeed induced through the coil when the magnetic flux changes.

When there is a change in magnetic flux through a coil, an induced electromotive force (emf) is created according to Faraday's law of electromagnetic induction. This principle states that the electromotive force induced in a coil is proportional to the rate of change of magnetic flux through that coil. As a result, when the magnetic flux changes—either increasing or decreasing, or even fluctuating—it generates an electric current in the coil.

The induced current flows in a direction that opposes the change in magnetic flux, a phenomenon described by Lenz's law. This interaction between the changing magnetic field and the induced current demonstrates the fundamental relationship between electricity and magnetism.

Thus, the correct response reflects this essential principle of electromagnetic induction, confirming that an electric current is indeed induced through the coil when the magnetic flux changes.