Battery

Definition: A battery is a device that charges electrical devices.

Sentence: I use two batteries to charge my TV remote at home.

Conductors of electricity

Definition: A conductor is an object that allows a flow of charge in other directions.

Sentence: Steel is one of the conductors of electricity.

Electrical charge

 Definition: Electric charge, which can be positive or negative, occurs in discrete natural units and is neither created nor destroyed.

Sentence: Electrical charge is a property of protons and electrons.

Electrical Circuit

Definition: The path that electrons flow from.

Sentence: The lights in your house are electric circuits.

Electrical Current

Definition: It is an electric charge in motion.

Sentence: A lightning bolt is an example of an electrical current.

Electrical Insulators

Definition: Insulators stop currents and they make poor conductors.

Sentence: Glass, rubber, and wood are all examples of electric insulators.

Incomplete Circuit

Definition: An incomplete circuit is an electrical circuit where no current flows.

Sentence: An incomplete circuit is also known as an open circuit

Insulator

Definition: A substance which does not readily allow the passage of heat or sound.

Sentence: A vacuum is a type of an insulator, even though it is not a material.