Physlets are back to life again! Last update 9-20-2019.

**Charge, Charging, and Coulomb's Law**

- Charge
- Four Charges
- Charged Rod and Soda Can
- An electroscope
- Conductors and Insulators
- Charging an Electroscope
- Conservation of Charge
- As Time Goes By
- Coulomb's Law
- The Magnitude of the Force Between Charges
- Coulomb's Law in 1-D
- Coulomb's Law in 2-D

**Electric Field**

- Field Lines and Field Vectors
- Field Line Question
- Field Vector Question
- A Test Charge
- Test Charge Questions
- The Parallel with Gravity
- Projectile Motion
- Electric Field from a Point Charge
- Electric Field from a Dipole
- Electric Field from Two Like Charges
- Motion of a Test Charge
- The Field from Multiple Point Charges
- Where is the Field Zero?
- Graphing Electric Field
- A Point Charge vs. a Line of Charge
- Field from a Line of Charge
- Field from a Ring of Charge
- A Charged Conductor vs. a Charged Insulator
- Field Near Conductors at Equilibrium
- Shielding

**Gauss' Law**

- Counting Field Lines
- Electric Flux
- Charge Density
- An Infinite Line of Charge
- An Infinite Sheet of Charge
- Parallel-plate Capacitor
- Spherical Symmetry
- What is on the Graph?
- Plotting field as a function of distance
- Concentric Spheres
- A Non-uniform Charge Distribution

**Potential and Potential Energy**

- Potential Energy for Point Charges
- Potential Energy in a Uniform Field
- Potential Energy in a Non-Uniform Field
- Electric Potential
- Potential in a Uniform Field
- Potential in a Non-Uniform Field
- Connecting Potential to Force
- Which Takes More Work?
- Releasing Two Charges
- A Charge and a Dipole
- Accelerating a Charge through a Potential Difference
- A Set of Point Charges
- Field and Potential for Charged Spheres
- Field and Potential for Concentric Spheres
- A Point Charge and a Charged Shell
- Potential from a Line of Charge
- Potential from a Ring of Charge

**Capacitors**

- Playing with a Capacitor
- Calculating Capacitance
- Energy in a Capacitor
- Capacitors in a Combination of Series and Parallel
- A Capacitor with a Dielectric
- The Dielectric Constant

**DC Circuits**

- A Microscopic Model of a Conductor
- Current
- Doubling Current
- Fluid Flow Analogy
- Resistance of a Coax Cable
- Resistors in a Combination of Series and Parallel
- Kirchoff's Loop Rule
- Applying Kirchoff's Rules
- RC Circuits
- Doubling R in an RC Circuit

**Charges and Currents in Magnetic Fields**

- Observing a Charge in a Magnetic Field
- Practice with the Right-Hand Rule
- Circular Paths
- Possible Paths of a Charge in a Uniform Magnetic Field
- Mass Spectrometer: Acceleration
- Mass Spectrometer: Velocity Selection
- Mass Spectrometer: Mass Separation
- Cyclotron
- The Hall Effect
- A Current Loop in a Uniform Field
- Torque on a Current Loop
- The Equivalent Bar Magnet
- Which Loop is Stable?
- A DC Motor
- Force Between Parallel Wires
- Three Wires
- A Current Loop in a Non-Uniform Field

**Calculating Magnetic Fields**

- Biot-Savart Law
- Field from a Straight Wire
- Field from a Long Straight Wire
- Field from an Arc of Current
- Field at the Center of a Loop
- Gauss' Law for Magnetism
- Ampere's Law
- Ranking the Loops
- Field from a Long Straight Wire
- Field Inside a Long Straight Wire
- Field From a Hollow Cylinder
- Concentric Cylinders
- Field from an Infinite Sheet of Current
- Field inside a Solenoid
- Field on the Axis of a Current Loop

**Magnetic Materials**

**Faraday's Law**

- Field from a Bar Magnet
- Changing Area
- Faraday's Law Example
- A Pictorial Approach to Lenz's Law
- Examples
- Increasing the Area of a Loop Near a Bar Magnet
- Motional emf Example
- A Moving Bar
- General Form of Faraday's Law
- Generators
- Faraday's Law Quiz

**Inductance**

**AC Circuits**

- Just a Resistor, just a capacitor, or just an inductor
- Effective Resistance
- R and C, or R and L
- Filters
- Dimmer Switch
- The Impedance Triangle
- RLC Series Circuit

**EM Waves**

**Geometrical Optics**

- Reflection of Light
- A Plane Mirror
- Spherical Mirrors
- Example Mirror Problems
- Index of Refraction
- Refraction
- A Model of Refraction
- Huygen's Principle
- Refraction and Total Internal Reflection
- Dispersion
- A Rainbow
- Lenses
- Example Lens Problem
- The Human Eye

**Interference and Diffraction**

- Interference from Two Sources
- Single Slits and Double Slits
- More than Two Sources
- Intensity with More than Two Sources
- Spectroscopy with a Diffraction Grating
- Intensity for the Double Slit
- A Prism and a Diffraction Grating
- The Rayleigh Criterion

**Thin-film Interference**

**Polarized Light**

**Modern Physics**

- Time Dilation
- Blackbody Radiation
- Photoelectric Effect
- Compton Effect
- Wave-Particle Duality
- de Broglie's justification of Bohr's assumption
- Energy levels for hydrogen
- Radial functions
- Probability density clouds
- Radioactive decay

Last modified 9-20-2019, bringing the Physlets back to life again

Modified 5-15-2015, updated with a signed jar file for every simulation