Mark Pecaut

How does an electric motor work?

Magnetic force on a current-carrying wire

Velocity not perpendicular to the magnetic field, causing aurora

Electric vs magnetic forces, and the velocity selector

Motion of charges in a magnetic field and mass spectrometers

Magnetic Forces on Moving Charges (Lorentz Force)

The direction of the cross product

Magnetic fields and magnetic dipoles

How R and C affect RC circuits

RC Circuits - Charging

The decreasing rate of discharge of an RC circuit

Introduction to RC circuits

Measuring voltage in circuits

Power in Circuits, adding bulbs in a circuit example

Power in Series and Parallel Circuits Example

Power in Circuits

Circuit Analysis Example #2

Circuit Analysis Example #1

Equivalent Resistance in Series and Parallel Circuits

Measuring Current in Circuits

Current vs Voltage: Voltage drops across a resistor example

Parallel Circuits

Series Circuits

Current vs Voltage: Current splits at junctions example

Ohm's Law, a Simple Circuit Example

Resistance and resistivity

Current and Ohm's Law

Parallel Plate Capacitors

Capacitance

Equipotential lines and the conductive tube