Free AP Physics 2 Electricity & Magnetism Help Program

What EMHELP covers:

• ✅ Program Guide — quickly see what EM1, EM2, EM3, WAVES, and UNITCON are designed to do
• ✅ Electric Charge — conservation, quantization, attraction, and repulsion
• ✅ Coulomb's Law — electric force between point charges and how charge signs affect attraction or repulsion
• ✅ Electric Fields — field direction, point-charge fields, units, and superposition
• ✅ Electric Potential & Energy — voltage, potential energy, work, and important sign relationships
• ✅ Electric Dipoles — dipole moment, torque, potential energy, and stable orientation
• ✅ Gauss's Law — electric flux, enclosed charge, and symmetry
• ✅ Capacitors — parallel plate, cylindrical and spherical capacitors, series/parallel combinations, energy, and dielectrics
• ✅ DC Circuits — Ohm's Law, resistors, electrical power, Kirchhoff's laws, and RC circuits
• ✅ Magnetic Fields — field direction, Lorentz force, right-hand rules, Biot-Savart, Ampere's Law, and magnetic flux
• ✅ Electromagnetic Induction — Faraday's Law, Lenz's Law, motional EMF, self-inductance, and RL circuits
• ✅ Transformers — turns ratio, voltage/current relationships, power, and step-up vs. step-down behavior
• ✅ AC Circuits — RLC circuits, impedance, reactance, resonance, AC power, power factor, and phasors
• ✅ Waves & Optics — electromagnetic waves, wavelength, frequency, photon energy, interference, and diffraction
• ✅ Polarization — polarizers, Malus's Law, Brewster's angle, and multiple polarizers
• ✅ Maxwell's Equations — conceptual overview of the four major classical electromagnetism equations
• ✅ Quick Index — start with the type of problem and find the correct solver program

📌 Free Companion Program — concept help and navigation, not full numerical solving

EMHELP explains concepts, reviews equations and direction rules, and points you toward the correct calculator program. It does not perform the full numerical calculations itself. For numerical problem solving, use the Electricity & Magnetism Solver Bundle .

Example: You're Stuck on a Lenz's Law Problem

1. Open EMHELP → Induct/Transform → Lenz's Law to review what the law means and how to determine the direction of the induced field/current.

2. When you are ready for the calculation, open EM2.

3. Use the appropriate Faraday's Law, Lenz's Law, magnetic flux, or motional-EMF section for the problem.

⚡ Ready to solve the problems?

EMHELP explains the physics and helps you choose the right approach. The Electricity & Magnetism Solver Bundle includes the numerical solver programs referenced throughout EMHELP:

• EM1 — electrostatics, electric fields, potential, capacitors, and DC circuits
• EM2 — magnetism, electromagnetic induction, inductors, transformers, and Maxwell's equations
• EM3 — AC circuits, RLC circuits, impedance, resonance, phasors, wave optics, and polarization
• WAVES — wavelength, frequency, wave speed, photon energy, visible light, and spectroscopy
• UNITCON — SI prefixes and unit conversions for physics and STEM problems

Use EMHELP to understand the problem and choose the right tool. Use the solver bundle to perform the calculation and check your work.

📚 Preparing for AP Physics 1 or AP Physics 2?

The AP Physics Ultimate Bundle includes calculator programs for mechanics, electricity and magnetism, waves, vectors, and unit conversions.

Need help? Install Guide (2026) | Troubleshooting | FAQs

AP® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this product. These programs are study tools designed to improve understanding and exam preparation. Use of calculator programs must comply with your specific school or testing center's policies.