1.0 Electrical energy can be transferred and stored. Flashcards
(18 cards)
Atoms have positives and negative subatomic particles. What are they?
The proton has a positive charge.
The electron has a negative charge.
When is an atom neutral?
When they have the same number of protons and electrons. No charge.
An object has built up a static charge. “Static” means what? What does it not do?
“Not moving” or “stationary.” This type of charge does not flow like the electrons in an electrical current.
What does it mean when an atom is ionized?
Atoms gain or lose electrons. The atom that loses an electron becomes a positive ion. The atom that gains an electron becomes a negative ion.
How do charges repel?
+ ←→ +
- ←→ -
+ →← -
How is current electricity different from static electricity?
Current electricity flows continuous; travels through wires
Static electricity is stationary
When there are more protons than electrons, the object has a what?
Positive static charge.
When there are more electrons than protons, the object has a what?
Negative static charge.
Do protons or electrons transfer from object to object.
Electrons.
What is the law of attraction?
Opposite charges attract each other, like charges repel each other.
What is static electricity?
A build up of electrons caused by friction, a negative charge builds up, then discharges when near an object that will accept or donate electrons. Electrons do not flow continuously, they are discharged all at once.
Do protons flow?
No.
What is electrical discharge?
A sudden transfer of electrical charge from one object to another, indicated by a spark.
How is an electrical current created?
An electrical current is created by moving electrons (protons do not flow).
What are the 2 requirements for an electrical current?
The flow of electrical current requires an energy source.
Electrical current will not flow unless it has a complete path or circuit for the charged particles to flow through.
What is a circuit? And what is it made up of?
The continuous path that an electrical current flows through. It is made up of a conductor (wires), load (device that draws electricity ex. light bulb) and an energy source (battery).
What’s a conductor? Examples? What does it best?
A material that freely allows electrical charge to move through (think of it like a stream with no boulders obstructing the flow). Good conducting materials: Steel, copper, gold, salt water and silver. Moist materials tend to conduct better than dry materials.
