Electromagnetic Induction and Alternating Current

Electromagnetic induction is the phenomenon

Electromagnetic induction is the phenomenon in which a changing magnetic flux through a closed loop induces an electromotive force (emf) and hence a c

Magnetic flux (φ_B) through a surface

Magnetic flux (φ_B) through a surface is defined as the total number of magnetic field lines passing through that surface. Mathematically, φ_B = B · A

Faraday's Law states that the magnitude

Faraday's Law states that the magnitude of the induced emf in a loop is equal to the rate of change of magnetic flux linked with that loop: |ε| = dφ_B

Lenz's Law states that the direction

Lenz's Law states that the direction of the induced current is always such that it opposes the change in magnetic flux that caused it. In mathematical

When a solid conductor (like

When a solid conductor (like an iron sheet) is placed in a changing magnetic field, induced currents are set up in closed loops within the body of the