A common example of electromagnetic induction is a moving magnet passing through a coil of wire, which generates an electric current in the coil. When you move a bar magnet quickly in and out of a copper wire coil, a galvanometer connected to the coil will detect a current flowing through it—even though the coil isn't connected to any battery.
This happens because the changing magnetic field through the coil induces an electric field, which pushes electrons and creates current. The faster you move the magnet or the stronger it is, the greater the induced current. If you hold the magnet still inside the coil, no current flows, demonstrating that the change in magnetic field is what matters.
Another practical example is an electric generator in a power plant, where mechanical energy (falling water, steam, or wind) spins a coil of wire inside a magnetic field. As the coil rotates, the magnetic field through it constantly changes direction, inducing an alternating current that supplies electricity to homes and businesses.
A third everyday example is an induction cooktop, where an alternating electric current in a coil beneath the cooking surface creates a changing magnetic field. This induces currents in the metal bottom of a pot, which generate heat through electrical resistance. This is why induction cooktops only work with magnetic cookware—non-magnetic materials won't have currents induced in them.