AP Physics C: E&M Diagnostic

Short topic-level assessments built around documented student misconceptions. Each diagnostic surfaces which specific wrong ways of thinking are costing you points, then routes you to targeted drills that fix only those. Units run 8 through 13, the College Board's own numbering. Pick a topic to start.

Unit 8

Electric Charges, Fields, and Gauss's Law

8.1 Electric Charge and Electric Force Start → 8.2 Conservation of Electric Charge and the Process of Charging Start → 8.3 Electric Fields Start → 8.4 Electric Fields of Charge Distributions Start → 8.5 Electric Flux Start → 8.6 Gauss's Law Start →

Unit 9

Electric Potential

9.1 Electric Potential Energy Start → 9.2 Electric Potential Start → 9.3 Conservation of Electric Energy Start →

Unit 10

Conductors and Capacitors

10.1 Electrostatics with Conductors Start → 10.2 Redistribution of Charge between Conductors Start → 10.3 Capacitors Start → 10.4 Dielectrics Start →

Unit 11

Electric Circuits

11.1 Electric Current Start → 11.2 Simple Circuits Start → 11.3 Resistance, Resistivity, and Ohm's Law Start → 11.4 Electric Power Start → 11.5 Compound Direct Current Circuits Start → 11.6 Kirchhoff's Loop Rule Start → 11.7 Kirchhoff's Junction Rule Start → 11.8 Resistor-Capacitor (RC) Circuits Start →

Unit 12

Magnetic Fields and Electromagnetism

12.1 Magnetic Fields Start → 12.2 Magnetism and Moving Charges Start → 12.3 Magnetic Fields of Current-Carrying Wires and the Biot-Savart Law Start → 12.4 Ampère's Law Start →

Unit 13

Electromagnetic Induction

13.1 Magnetic Flux Start → 13.2 Electromagnetic Induction Start → 13.3 Induced Currents and Magnetic Forces Start → 13.4 Inductance Start → 13.5 Circuits with Resistors and Inductors (LR Circuits) Start → 13.6 Circuits with Capacitors and Inductors (LC Circuits) Start →

All six units are live. Each diagnostic is about 10 questions and takes 8 to 12 minutes. Missed items map to named misconceptions; the result page links you straight to drills that target those specific failures.