Electrical Flashcards
This component of matter is the smallest part that matter can be divided into without changing its makeup.
Molecules
What are molecules made up of?
Atoms
What are atoms made up of?
- Protons
- Neutrons
- Electrons
The protons and neutrons are located in the nucleus of the atom.
What parts of an atom are located in the nucleus of the atom?
Protons and neutrons
Which parts of an atom are located outside of the nucleus?
Electrons
What components of an atom exert a force known as an electric charge?
Protons and electrons.
Protons are positively charged, and electrons are negatively charged.
Which component of an atom has no charge?
Neutrons
Neutron = neutral.
True or false: Normal atoms have the same number protons and electrons and are neutral in charge.
True
If an object has more protons than electrons, it is ____________ charged.
Positively
If an object has more electrons than protons, it is ____________ charged.
Negatively
What are free electrons?
Electrons that are loosely bonded around the nucleus and can readily be knocked loose.
These are conductors.
____________ is a useful form of energy derived from unbalanced electrical charges in materials.
Electricity
When electricity does not move, it is called:
Static electricity
The Law of Electric charges states that like charges ___________ (attract/repel) on another.
repel
The Law of Electric Charges states that unlike charges ____________ (attract/repel) one another.
attract
What are the two aspects of electromagnetism?
- Magnetism
- Electricity
This is one of the fundamental natural forces.
______________ is a physical phenomenon caused by electron movement.
Magnetism
This movement causes a magnetic field around the magnet.
What causes a magentic field to develop around a material?
Electron movement
True or false: A strong magnetic field occurs when a formation of aligned atoms occurs in a material.
True
This type of magnet is caused by spinning electrons in the atoms that make up the material the magent is formed out of.
A permanent magnet
What causes the magnetic property of an electromagnet?
Electrons moving through a coil of wire wound around a core material.
Why is the magnetic field the strongest at the north and south poles of a bar magnet?
This is where the magnetic lines of flux are densest.
The more lines of flux, the greater the magentism.
What happens to the end of an iron bar as it is brought close to a magnet?
The end of the iron nearest the magnet assumes the opposite polarity of the magnet.
This causes the iron bar to become attacted to the magnet.
Remember that opposite charges attract while like poles repel
Placing a compass near a wire carrying an electric current causes the comapss needle to deflect at right angles to that wire. The direction this deflection depends upon:
the direction (polarity) of current flow