In magnet-coil experiment, emf can be produced by:

Explanation

In a magnet-coil experiment, the electromagnetic force (emf) can be produced by All of the these.Motion of loop and magnet: When either the magnet or the coil (or both) is moved relative to each other, the magnetic flux through the coil changes. According to Faraday's law of electromagnetic induction, a changing magnetic flux induces an electromotive force (emf) in the coil. Therefore, the motion of either the loop or the magnet can induce an emf in the coil.Keeping the magnet stationary and moving the coil: If the coil is moved while the magnet is held stationary, the magnetic flux through the coil changes, inducing an emf in the coil.Keeping the coil stationary and moving the magnet: If the magnet is moved while the coil is held stationary, the magnetic flux through the coil changes, also inducing an emf in the coil.