Lesson 1 - What is Electricity?

A device used to convert electric energy into mechanical energy.

• motor

• battery

• conductor

• generator

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A device used to convert mechanical energy into electrical energy.

• motor

• conductor

• battery

• generator

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The force behind the movement of electrons.

• atomic number

• resistance (r)

• power (w)

• voltage (V)

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A proton with no charge that is found in the nucleus of an atom.

• proton

• semiconductor

• neutron

• electron

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A flow of electric charge.

• current

• conductor

• battery

• circuit

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The atomic number is equal to the number of protons (positively charged particles) in the nucleus of an atom.

• valence electrons

• electron

• atomic number

• element

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Strips or bars of metal insulated from each other and arranged around one end of an armature. Used to flip the flow of electricity, so positive becomes negative and negative becomes positive.

• commutator

• generator

• conductor

• insulator

The outermost ring of electrons in an atom. Used to determine whether an element is an insulator, conductor or semiconductor.

• atoms

• valence electrons

• static electricity

• free electrons

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A semiconductor diode that emits light when conducting current.

• parallel circuit

• closed (complete) circuit

• transducer

• Light Emitting Diode (LED)

A device or material that permits current to flow through it easily.

• commutator

• insulator

• generator

• conductor