Applying Elecgtromagnetism

What type of electric motor uses a commutator?

Which electric bulb is the most efficient?

What is the most common type of electrostatic generator in use today?

What type of lamp is made by passing current through a narrow tube of gas?

What type of lamp produces light by heating a thin piece of wire?

What device stores electricity on foil lining the inside of a glass jar?

What device converts absorbed sunlight directly into electricity?

What part of an electric motor is freely rotating?

What part of an AC electric generator keeps its wires from twisting?

What converts electricity into sound waves?