I can explain voltage, current, and resistance and use Ohm’s law to solve simple circuit problems.
POE Unit 1 • Lesson 1.10
Electrical Basics: Voltage, Current, and Resistance
Focus question: How do voltage, current, and resistance explain what is happening in a circuit?
Mission Briefing
Today’s Plan
A focused lesson sequence that builds toward the VEX Rover Mechanisms Challenge.
Opening promptConcept voteAerospace linkCompare optionsEvidence challengeQuick checkExit ticket
Lesson Targets
What You Will Be Able to Do
Ohm’s law practice and circuit notes
Ohm’s law solutions use consistent units and explain what the voltage, current, and resistance mean for a real component.
Activity Flow
How the Lesson Moves
This page highlights the lesson elements you need for practice, evidence, and submission.
1. Identify circuit quantities
Locate the source voltage, component resistance, and current path.
2. Apply Ohm’s law
Solve for the missing variable and convert units when needed.
3. Check component limits
Compare predicted current and power with safe operating values.
Lesson Interactive
Ohm’s Law Circuit Check
Set the supply voltage and resistance, then calculate current and electrical power.
Circuit Inputs
Previewed current:
Your Solution
Use I = V/R, then P = VI.
Today’s Work
Main Deliverable
Ohm’s Law Practice and Circuit Notes
Solve a short set of rover-circuit problems and annotate one circuit diagram.
- Show substitutions, units, and final values for voltage, current, resistance, and power.
- Write one sentence explaining how changing resistance affects current at constant voltage.
Exit Ticket
Mission Debrief
One way today’s lesson connects to an aerospace mechanism or VEX rover system.
One type of evidence you could use to support a design decision.
One question you still have about mechanisms, energy, power, or the Unit 1 challenge.
Resources
Lesson Resources
Principles of Engineering
Return to the POE course hub for units, resources, certifications, and current course information.
VEX Rover Mechanisms Challenge
Use this unit project context when connecting the lesson to mechanism planning, testing, and design review evidence.