Electricity Flashcards
What is voltage
Electrical pressure (how much energy each electron has
What is resistance and give an example
Opposition to the flow of electrons, friction
Why does a balloon stuck to a wall if you rub your hair first
Electrons go from you hair to the balloon making t negative and then the positive nuclei are attracted to the balloons electrons so it sticks to the wall by static charge build up
What is static electricity
Non flowing electrons
What is electric current
Flow of electrons
What is coloumbs laws
The force between two charged particles is directly proportional to the amount of charge and inversely proportional to distance squared
What does coloumbs law say about distance and strength of attractions between charges
If the amount of charge on two part files doubled the force between then it is twice as much, if the distance is doubled then force between them is 1/4 of what it used to be
What happens to the strength of atttaction between two charges particles if distance is doubled
The force between them is 1/4 of what it was before
What if the distance is cut in half
4x as much
What if the strength of both charges doubled
Then the force is 4x as much
What is ohms law
Relationship amount current, voltage and resistance
How are pressure and voltage related
More pressure equals more voltage
How are voltage and current related
More voltage equals more current
How are resistance and current related
More resistance equals less current
What is current measured in
Amperes
What is resistance measured in
Ohms
Voltage measured in
V
Two types of static electricity can be made
Static charge build up by friction and static charge build up by induction
Induction
Charged caused by electrons changing their position within a substance
Series circuit
All loads in a single file line connected by a sequential wires
Parallel circuit
Bulbs or loads are not in a single file line more than one path electricity takes to get to the positive end of the battery
Current equation
C=v/r
What is current
Flow of electrons
