Is LRNRS Free Battles really free?

Yes! Free Battles are completely free forever. No hidden costs, no paid tiers required. You can create unlimited battles with 1-4 questions each.

How is LRNRS different from Kahoot?

LRNRS is faster (60-second setup vs multiple minutes), completely free (no paid tiers for core features), requires no sign-up for teachers or students, and has AI that generates better technical questions with proper calculations and LaTeX support.

Do students need accounts to join?

No - students just enter a join code and their name (or nickname). No email, no password, no account required. Privacy-first design.

Can I use LRNRS for formative assessment?

Yes! After each battle, you receive an email with student rankings, question-by-question accuracy stats, and which questions students found most difficult. Perfect for identifying gaps in understanding.

Live Quiz Battles for

Circuits & Electronics Classes

Run live circuit analysis quiz battles in about 60 seconds. LaTeX rendering for impedance equations, phasors, and transfer functions. Students join with a code — no accounts, no app.

No student accounts • Unlimited participants free • Manual creation free forever

Why EE Instructors Use LRNRS

Circuit diagram questions

Upload a circuit schematic and ask students to find the Thevenin equivalent, identify the node voltage, or determine the output of an op-amp configuration. Images display on every student's device.

LaTeX for EE notation

Render phasor notation, impedance expressions, and transfer functions correctly — $Z = R + j\omega L$ — so answer choices are unambiguous and readable on phones.

Conceptual vs. calculation checks

Mix conceptual questions ("What happens to the voltage across a capacitor at DC steady state?") with short-calculation questions. Set different time limits for each — 30 seconds for conceptual, 90 for calculations.

Works for intro and upper-division courses

From basic DC resistor networks in a first circuits course to op-amp feedback analysis or AC power in upper-division EE — write questions at any level and launch instantly.

Topics Instructors Use LRNRS For

Ohm's law and resistor networks
Kirchhoff's voltage and current laws
Thevenin and Norton equivalents
Capacitor and inductor transient response
AC sinusoidal analysis and phasors
Impedance and complex power
Operational amplifier circuits
Frequency response and Bode plots

Example Battle: KVL / KCL Check

4-question battle, mixed time limits

Q1 — Conceptual (30s)

In a series circuit, if resistance doubles and voltage is held constant, what happens to current?

Q2 — Diagram (60s)

Uploaded circuit with 3 nodes — which equation correctly applies KCL at node B? (4 rendered equation options)

Q3 — Thevenin (90s)

Given resistor values, what is the Thevenin resistance seen at terminals A-B? Choose the correct expression.

Q4 — Conceptual (30s)

At DC steady state, an ideal capacitor behaves as: (a) short circuit (b) open circuit (c) resistor equal to 1/C (d) voltage source

Run your first circuits battle today

Free to start. Write a few KVL/KCL or op-amp questions, upload a schematic, launch, and see who's actually following the analysis.