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Electricity, Mag.

Electricity and Magnetism flashcards

QuestionAnswer
Electric force exists between two charged particles
Coulomb’s Law The force between two electrical charges is proportional to the product of the charges
Electric field Surrounds every electric charge
Electric field lines point in direction that a positive charge would when in the presence of an electric field
electricity the movement of electrons
Electrical conductor material that allows electrons to flow through it
Electrical insulator material that does not allow electrons to flow through it
semiconductor a material with few electrons to conduct, but can have more be freed by adding energy (thermal or otherwise)
superconductor a material which has its resistivity decrease to zero as the temperature decreases to a certain point referred to as a critical temperature or critical value
static electricity a result of an excess of positive or negative charges on an object’s surface.
friction what allows lose electrons to be rubbed off and transferred to a new object
induction caused when a charged object is brought near to, but does not touch, an insulator.
conduction caused when two objects (one neutral and one charged) are brought into contact with each other
Current electricity current electricity has electrons flow through a circuit like water through a pipe
current the flow rate of electrons through the circuit, measured in ampere
resistance measure of how difficult it is to move electrons through a circuit
voltage force that moves electrons through a circuit, measured in volts
ampere measurement of electron flow through a circuit
coulomb unit of electric charge equal to the quantity of electricity flowing in one second by a current measuring one ampere.
Potential difference difference of electrical potential between two different points
volt unit of measurement for voltage
Ohm’s law states that the resistance is equal to the voltage divided by the current, revealing a linear relationship between voltage and current.
ohms unit of measure for resistance
resistivity measure of how strongly a material resists electric current
circuit path of which electricity is conducted
Series circuit all current is the same through every part (or load)
Surge protector a power strip that diverts electricity to its outlets. If there is too much electricity, called a surge, the excess is diverted to a ground wire.
Circuit diagram a diagram made using specific symbols to represent a circuit
switch used to open and close the circuit. When open, electricity will not flow. When closed, electricity does flow through the circuit.
fuse safety device used to provide overcurrent protection for an electrical current.
Parallel circuit unlike a series circuit, has more than one path for the electricity to flow through
Circuit breaker Protects electrical circuits from overloading. Has many switches that shut down (or “break”) the circuit.
Bar magnet a man-made bar of a magnetic substance, can be used as a simple diagram of magnetism
de-magnetize to remove the magnetic qualities of something
Magnetic field an area that has invisible lines of force around the magnet and its two poles
magnetite a naturally occurring magnetic mineral
Magnetic field lines invisible force lines that point from the north to the south poles of a magnet
compass a navigation device consisting of a small magnet mounted on a pivoting point.
lodestone a primitive version of the modern day compass
Electromagnetic force a force responsible for electric charge and the flow of electrons, and the magnetic properties of earth metals.
electromagnet a device that becomes magnetic as electricity flows through it
alternating current electric current that reverses direction and changes magnitude over time
Direct current current that flows in only one direction
Created by: BurgerKing_07
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