The visual guide to
AP® Physics C: Electricity and Magnetism
6 units, 101 topics. Each topic is explained in writing, drawn as a lesson you can watch, and checked with practice questions.
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Each unit is as wide as its share of the exam's multiple-choice section.Filled: topics you've opened.
Unit 8Electric Charges, Fields, and Gauss's Law
- Electric Charge and Charge Quantization
- Coulomb's Law
- Superposition of Electric Forces
- Electric Force Compared with Gravity
- Conservation of Charge and Charging by Friction
- Charging by Conduction and Induction
- Polarization and Grounding
- Defining the Electric Field
- Electric Field Lines and Field Maps
- The Field of an Electric Dipole
- Motion of a Charge in a Uniform Field
- Charge Density and Setting Up the Field Integral
- The Field of a Charged Rod
- The Field on the Axis of a Charged Ring
- The Charged Disk and the Infinite Sheet Limit
- Electric Flux Through a Surface
- Flux Through a Closed Surface
- Gauss's Law and Choosing a Gaussian Surface
- Gauss's Law with Spherical Symmetry
- Gauss's Law with Cylindrical Symmetry
- Gauss's Law with Planar Symmetry
Unit 9Electric Potential
- Work and Electric Potential Energy
- Potential Energy of a System of Charges
- Assembling a Charge Configuration
- Electric Potential as a Scalar Field
- Potential of Point Charges and Superposition
- Potential of a Continuous Charge Distribution
- Getting the Field from the Potential
- Getting the Potential from the Field
- Equipotential Surfaces
- Energy Conservation for a Moving Charge
- Accelerating Charges and the Electron Volt
- Turning Points and Energy Graphs
Unit 10Conductors and Capacitors
- Charge on a Conductor in Equilibrium
- The Field at a Conductor's Surface
- Cavities and Electrostatic Shielding
- Conductors as Equipotentials
- Sharing Charge Between Connected Conductors
- Grounding
- Capacitance and the Parallel-Plate Capacitor
- Spherical and Cylindrical Capacitors
- Energy Stored in a Capacitor
- Energy Density in the Electric Field
- Capacitors in Series and Parallel
- Polarization Inside a Dielectric
- Inserting a Dielectric, Isolated or Connected
Unit 11Electric Circuits
- What Electric Current Actually Is
- Drift Velocity and Current Density
- Reading a Circuit Diagram
- Series and Parallel Basics
- Resistivity and the Geometry of a Resistor
- Ohm's Law and I-V Curves
- Ohmic and Non-Ohmic Devices
- Power Delivered to a Resistor
- Energy Delivered by a Battery
- Equivalent Resistance of a Network
- Internal Resistance and Terminal Voltage
- Ammeters and Voltmeters
- Bulb Brightness When the Circuit Changes
- The Loop Rule and Sign Conventions
- Solving a Two-Loop Circuit
- The Junction Rule and Charge Conservation
- Multi-Battery Circuits
- Charging a Capacitor Through a Resistor
- Discharging and the Time Constant
- Deriving the RC Exponential
- RC Circuits Right After Switching and Long After
- Energy in a Charging RC Circuit
Unit 12Magnetic Fields and Electromagnetism
- Magnetic Field Lines and Why They Close
- Gauss's Law for Magnetism
- Ferromagnetic, Paramagnetic, and Diamagnetic Materials
- The Magnetic Force on a Moving Charge
- Circular Motion in a Magnetic Field
- Helical Paths, Velocity Selectors, and Mass Spectrometers
- Force on a Current-Carrying Wire
- Torque on a Current Loop and the Magnetic Moment
- The Biot-Savart Law
- The Field of a Long Straight Wire
- The Field on the Axis of a Current Loop
- The Force Between Two Parallel Wires
- Ampere's Law and Choosing a Loop
- The Field Inside and Outside a Thick Wire
- Solenoids and Toroids
Unit 13Electromagnetic Induction
- Magnetic Flux Through a Loop
- Flux When the Loop Tilts, Grows, or Moves
- Faraday's Law
- Lenz's Law and the Minus Sign
- Motional EMF from a Sliding Bar
- A Loop Entering and Leaving a Field Region
- Induced EMF from a Changing Magnetic Field
- Induced Current and the Force That Fights You
- Energy and Power in an Induced Circuit
- Eddy Currents and Magnetic Braking
- Self-Inductance and Back EMF
- The Inductance of a Solenoid
- Energy Stored in an Inductor
- Current Growth in an LR Circuit
- Current Decay and the L over R Time Constant
- LR Circuits Right After Switching and Long After
- Oscillation in an LC Circuit
- Energy Trading Between Capacitor and Inductor