Electricity Unit Test Flashcards
Electric charge
the property of particles(neutrons, electrons, protons) that causes them to experience a force when placed in an electric and magnetic field like charges repel, opposite charges attract
Electric Feild
the attraction and repulsion of electrical charges
Which particle is moving when objects become charged?
When an object becomes charged electrons are moving
How do neutral objects acquire charge?
If a neutral atom gains electrons it will become negatively charged
If a neutral atom loses electrons it becomes positively charged
Static Electricity
The build up of charges on the surface of a material
Charges build up until they find a way to be released or discharged
Typically caused by friction
Positive=Shortage of electrons
Negative=excess of electrons
neutral=same # protons+electrons
Electric discharge
The flow of electric charge from one body to another body
Conductors
A substance that allows electricity and electrons to pass through it
Don’t hold a build-up charge
Insulators
A substance that don’t allow electrical current to easily pass through it
Charges build-up
Grounding
The removal of excess charges on a substance
Neutral Charge Equilibrium
Protons and electrons are the same
Static Charge
The result of an imbalance between negative and positive charges in an object
Can discharge through a circuit
Hair standing on end with a balloon
Electrons move from the atoms and molecules in your hair onto the balloon
The balloon becomes negatively charged
The hair becomes positively charged
Electric shock when touching a door handle
The knob is neutrally charged
You rub your feet on the carpet gaining extra electrons
The extra electrons want to jump from you to the knob
Electric current
The flow of electricity in a circuit and the amount of charge
Current flows from positive to negative
Voltage
A measure of how much force is pushing the current in a circuit
V=I*R
