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30 Cards in this Set

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what is the formula for resistance?
v
R = ----
I

Resistance

voltage
----
Current
what is the formula for power?
power = current* voltage
p= IV
whar is the formula for energy?
Energy = Power * time
E= P*T
what is the formula for power?
Power = Current * voltage
what is the formula for Current?
charge
------ = current
time
what is the formula for power?
Power = Current * voltage
whar is the formula for energy?
Energy = Power * time
E= P*T
what is the formula for voltage?
Voltage = Current * Resistance
V= IR

energy
-------
charge
What is Electric Current?
The flow of charge; measured in Amperes
What does electric potential mean?
energy per coloumb(J/C) at a location in an electric field; measured in volts and often called voltage
Potential difference?
difference in electric potential (voltage) between two points. Free charge flows when there is a difference, and will continue until both points reach a common potential.
What does ampere's equal?
charge = coulomb
------ -------
time second
What does potential difference, pressure difference, voltage potential and voltage difference have in common?
potential difference, pressure difference, voltage potential and voltage difference:

ALL REFER TO VOLTAGE OR THE FORCE THAT MOVES IN A CIRCUIT
What are 2 examples of voltage sources?
Battery and Generators all are types of "electric pumps"
What are 3 variables of delveloping Ohm's Law ?
Resistance: measured in Ohm's lessing of flow of charge, restriction

Voltage: measured in volts; forcethat moves electrons in a circuit

Current: charge over times
*Charge is measured in coulombs
Time for this is seconds
How is current and resistance inversely related?
When resistance goes up
Current goes down

Current~ 1
------
Resistance
What are the symbol for Current and Voltage, Resistance?
Current = I
Voltage = V
Resistance= R
How is current and voltage directly related?
As voltage goes UP
Current goes DOWN

current~voltage
What is ohm's law?
I = V
-
R

Current = voltage
-----
resistance

1 ampere = 1volt
--------
1 ohm

Voltage= current * resistance
What is the formula for ampere?
ampere = volt
---=
ohm
What is the formula for current?
Current= voltage
--------
resistance
I = v
-
r
how is voltANG and resistance DIRECTLY RELATED?
AS VOLTAGE goes up RESISTANCE goes UP
What is an other formula to find voltage?
joule
-----
coulomb
What does force consist of?
potential difference
electric pressure
pressure difference
What does 1 Ampere equal?
1 Amperes = 1COULOMB
---------
seconds

Symbol is A
What does force consist of?
potential difference
electric pressure
pressure difference
1 watt = 1 v * AMPERE =electric power

energy over time = powers

watts is a unit of POWER
watts is a unit of POWER
dc & ac
A Direct Current (DC) referring charge flowing in one direction. A battery produces direct current in a circuit because terminals of the battery always have the same sign of charge.


Alternating Current (AC) electrons in the circuit move first in one direction then in the opposite direction, alternating back and forth rather than in fixed positions. This action is accomplished by alternating the polarity of voltage at the generator or other voltage source.
watt / kilowatt
Power is a watt, and kilowatt. Energy is kilowatt-hour. Power: watt, kilowatt; energy: kilowatt-hour.
1 watt = 1 v * AMPERE =electric power

energy over time = powers

watts is a unit of POWER
watts is a unit of POWER