Equations
Ohm's law
V=IR
What type of current flows in one direction only, providing a constant voltage over time.
DC
What is a resistor
Creates resistance in the flow of electrical current
In what type of circuit does current flows through each component one after another, creating a single path for electricity.
Series
What is energy efficiency
Energy efficiency refers to using less energy to perform the same task/result.
Power equation
P=IV
What current type periodically reverses direction, typically used in household power outlets.
AC
What is a capacitor
Stores electrical energy
In a series circuit how do you find the total resistance
Sum of all resistances
What are common sources of energy losses in electrical systems
Motor inefficiencies, Transmission and distribution losses, Inefficiency of transformers, and/or Power factor losses
In a series you have a R=12 and a V=24, what is the current
I=2
If you plug something to a wall, what kind of current are you getting
AC
What is a transformer
Transfers electric from one circuit to another (AC)
(T/F) In a parallel circuit, if one component fails, the rest of the components continue to function.
True
How can energy losses in buildings be reduced
Improving insulation, upgrading windows and doors, Using LEDs, and/or using smart thermostats
In a series you have a R=36 and a V=9, what is the total power
P = 2.25
If you are using a battery, what kind of current are you getting
DC
What is a diode
Controls the direction of electrical current flow, converts AC --> DC
What type of circuit is commonly used in household wiring because if one light bulb burns out, the rest stay lit.
Parallel
What is the impact of energy efficiency on environmental sustainability
Improved environmental stability
In a parallel you have a R=4 and R=3, find the total resistance
Total resistance = 1.71
In most North American homes, this is the standard frequency at which alternating current changes direction.
60 hz
What are color codes
They refer to the strength of a resistor
In what type of circuit does adding more resistors results in a decrease in the total resistance
What role do renewable energy sources play in improving energy efficiency
Minimize reliance on fossil fuels and reduce transmission and distribution losses