Physics for Engineers
What is actually happening inside the wire
Circuits stop being magic once you know what charge, voltage and power really are. This track explains the physics underneath every circuit you will ever build.
Electricity from First Principles
Charge, voltage, resistance and power
- Charge & CurrentFreeWhat is actually moving in a wire, and why an amp is just a rate.12 min
- Voltage & EnergyFreeVoltage is not a force and it does not flow. It is energy per unit charge.12 min
- Resistance & Ohm's LawFreeWhat resistance physically is, and the one equation that ties it all together.12 min
- Power & EnergyFreeWhy components have wattage ratings, and how to check you are inside them.12 min
Networks, Time and Fields
Series and parallel, Kirchhoff, capacitors and magnetism
- Series & Parallel NetworksHow resistances combine, why parallel always lowers resistance, and how to reduce a messy network to a single number.13 min
- Kirchhoff's LawsThe two conservation rules that let you analyse any circuit, however tangled: current at a node, voltage around a loop.13 min
- Capacitors & RC TimeWhat a capacitor stores, why it blocks DC but passes AC, and the time constant that sets how fast a circuit responds.13 min
- Magnetism & MotorsHow current makes a magnetic field, how that field makes a motor turn, and why an inductive load will destroy your transistor if you let it.13 min
Motion, Heat and Waves
The physics beyond the circuit
- Forces & Newton's LawsWhy things move, why they stop, and why a robot that accelerates hard needs a motor sized for far more than its steady speed.13 min
- Work, Energy & MomentumTwo conservation laws that solve problems Newton alone makes painful, and the reason a heavy slow robot hurts as much as a light fast one.13 min
- Heat & ThermodynamicsWhere the wasted power in your circuit actually goes, how heat moves, and why every component has a temperature limit.14 min
- Waves, Sound & LightOne set of rules covers sound, light, radio and ultrasound, including the sensor that measures distance by timing an echo.13 min
The first module of every subject is free with an account. No card needed.