Ohm's Law Basics
This term describes the "electrical push" or pressure that gets electrons moving through a circuit, measured in Volts.
Voltage
Electrical power is measured in this unit, which represents Joules of energy transformed per second.
Watts
1000
The first "S" in the G.R.A.S.S. method stands for this phase, where you plug your numbers into the formula and use your calculator.
Solve
This variable measures the actual flow rate—how many electrons pass by a single point every second.
Current or Amps
This is the basic 3-variable formula used to calculate the electrical power rating of a device.
P = I x V
If an electricity question states that a gaming console was turned on for 30 minutes, you must convert the time into this decimal fraction of an hour.
0.5 hour
During the "G" phase of a word problem, a student must look at the question text and write down these two things.
Given
This symbol is used to represent the unit for electrical resistance.
Omega
A desktop lamp draws a current of 0.5 A when connected to a standard 120 wall outlet. This is its total power rating.
60 Watts
The result of dividing Watts by 1000.
Kilowatts
The letter "A" in G.R.A.S.S. stands for this word, which is the step where you pick and rearrange your formula.
Analysis
If a circuit has a voltage of 12 and a current of 2, this is its total calculated resistance.
This term describes how much electrical input energy actually converts into useful work (like light) versus how much is wasted as useless heat.
Percent Efficency
Convert a 1,500 W kitchen toaster into Kilowatts
1.5 kW
The final "S" step requires you to write a full concluding sentence, and you will lose easy marks if you forget to include this at the end of your number.
Statement
When using the Ohm's Law triangle, you must perform this mathematical operation if you cover the letter "I" with your thumb.
Division
A high-performance monitor has a power rating of 240 W and runs on a 120 V circuit. This is the exact current flowing through its display panel.
2 Amps
If a laptop uses 0.06 kW of power for 5 hours, this is the total number of kilowatt-hours kWh of energy it consumed.
0.3 kWh
This is the specific variable goal you are looking for during the "R" (Required) phase if a problem asks: What is the flow of electricity?
Current