Answer :

meerkat18
An electric current is a kind of flow of an electric charge that is present in electric circuits that often carried by the electrons in a wire and also be carried by ions in electrolytes or by both ions and electrons such as in a plasma. The possible use of it is in a circuits, connection between wires and the connection of every device
PBCHEM

Answer : There are many ways to use electric current, but as you have asked for only three, here are some of them along with the change in their energy transformations;

1) Using a light bulb which consumes electrical energy and the energy is transformed into light energy, making everything visible for us.

2) Using a power tool makes use of electrical energy and the energy is transformed into mechanical energy for multipurpose use of cutting woods.

3) Using electrical iron converts electrical energy into thermal energy to heat the iron and enables the user to iron crease-free clothes.