chapter 10 Flashcards
Count Volta
Italian scientist, in 1800 he invented the voltaic pile, the predecessor to the modern battery. THis was the first time scientists had a reliable source of electricity.
Protons have a ____ charge
+ positive
electrons have a _____ charge
- Negative
Nuetrons have a ____ Charge
nuetral charge
Protons and Nuetrons are located where
In the middle of the atom
Electrons are located where
around the outside of the atom
Accumulated electrons
static electricity
Conduction
electric charges flowing through a medium, like metal wires
induction
when the electrons move around because of them being around eachothether. pushing the object in question
an electrical current always runs fom
the negative to the positive
how to properly draw a diagram of an electrical flow
look at notes, I drew it there
Pump (analogical battery)
makes the water flow by creating a difference in pressure. The water will always flow from high to low pressure
pipe ( analogical wire)
provides a contained pathway for the water to flow
water ( analogical electricity current)
flows in the pipes. flowing water actually consists of many individual molecules moving along In the pipe.
filter ( analogical resistor (like a lightbulb) )
procides resistance to the flow of water. the resistance depends on how tightly the filter is packed. it’s doing a practical job (cleaning the water) and that’s why we even have the water circuit.
AC
Alternating current, this means that the current and voltage are constantly changing ( alternating from + to - and back again.) (example: the electricity that comes from a wall outlet)
DC
Direct current, a flow of electricity that does not change direction, like batteries
Ampere (AMP)
THe scientific unit of electrical current
Resistance is measured in
ohms
Voltage is measured in
volts
current is meausured in
ampiers
Voltage equation ( Ohm’s law)
V = IR
Electrical power equation
P = IV
In a DC the current flows from
positive to negative
In a DC current the electrons flow from
negative to positive
Resistor
Slows the current by stopping the current ACROSS itself, not through it
µ
micro
Ω
ohlms
Types of two-resistor networks
Series and Parrelel
Series network
two resistors are on the smae wire as eachother
Parallel
splits stream into two seperate wires connected to the same wire.
how do wiresr work when splitting
If a passage is bigger more liquid will go through it than the smaller one
Resistance equation
R = V/I
REQ for Series circuit
REQ = R1 + R2 + R3…
Kirchhoffs law
the current going into a junction must equal the sum of all the currents exiting the wire
kirhhoffs voltage drop law
The voltage rise will equal the voltage drop
Ohms law
V = IR
