QUICK REVIEW
Quick Review — Current, Resistance, and Ohm's Law — Foundational
Refresh the essential ideas and relationships for Current, Resistance, and Ohm's Law in just a few minutes.
TIME
5–10 minutes
BEST FOR
A rapid refresh
FINISH WITH
Key ideas refreshed
After this quick review, you'll be able to...
recall the essential ideas and decide what to review next.
Choose how you want to review
Course Alignment
This Physics Sensei Unit Review is an independent learning resource. Use it to reinforce key concepts, prepare for homework, or review before a quiz or exam.
RESOURCE: Physics Sensei Unit Review | UNIT ID: EME-U06 | TOPIC: Current, Resistance, and Ohm's Law | COURSE LEVEL: Foundational
BEST USED ✓ After learning the unit ✓ Before starting homework ✓ Before a quiz or exam
Your Review Plan
Complete these four stages to quickly refresh the essential ideas and confirm you're ready to continue.
4 Stages • Approximately 5–10 minutes.
Quick Recall
Let's quickly refresh what you already know. These short recall activities will help you bring the most important ideas back to mind before reviewing them.
QUICK RECALL
Recall Activity
Complete the three statements from memory before revealing the answer.
What physical quantity must move across a cross-section for electric current to exist?
Reveal Answers
Electric charge moves; in a metal, the mobile carriers are electrons.
Why it works: Current requires transport of electric charge across a surface, rather than motion of energy or voltage. Metals contain mobile electrons that carry this charge through the wire.
Ready to refresh the essentials?
Great! Now let's review the most important ideas you'll want to remember.
Essential Idea
Take one last look at the most important concept from this unit. If you remember this idea, the rest will come back much more easily.
ESSENTIAL IDEA
What current means
Electric current is the rate at which electric charge crosses a chosen surface. Conventional current points in the direction positive charge would move. In metal wires, electrons drift in the opposite direction.
Example: A lamp can carry a steady current even though individual electrons drift slowly.
Sensei note: Do not confuse conventional current direction with electron motion.
Ready to check your memory?
You've refreshed the essential idea. Now see how much you remember before moving on. Need a quick reminder?
Confidence Check
You've refreshed the essential ideas. Now answer this quick confidence check to confirm you're ready to move on.
CONFIDENCE CHECK
Current direction
Answer all three without notes.
In a copper wire electrons move to the right. State the conventional current direction.
Reveal Answers
Left; conventional current follows positive charge.
Why it works: Conventional current is defined by the motion positive charge would have, so it points opposite the electron drift direction in a metal conductor.
Ready for your next step?
Great work! You've refreshed the essential ideas. Now choose the resource that best matches what you'd like to do next. Need a quick reminder?
Next Step
Great work!
You've completed this review. Choose the next resource that best matches how confident you feel.
I'm Still Unsure
Review the key ideas and examples again.
Review Again →
I Need More Practice
Continue with additional practice for this unit.
Go to Practice →
I'm Ready
Continue to the next recommended resource.
Continue →