World's Simplest Electric Train

A dry cell, two magnets and a coil: very simple and surpringly effective.

 

Hewitt-Drew-it! 102. Electromagnetic Induction

History, explanations, and implications of E&M inductions.

 

Hewitt-Drew-it! 101. Magnetism

From bar magnets to electric motors.

 

Magnetic Hair

MIT engineers have fabricated a new elastic material coated with microscopic, hairlike structures that tilt in response to a magnetic field. (Learn more about these structures: http://bit.ly/1y2E8SX) Depending on the field's orientation, the microhairs can tilt to form a path through which fluid can flow; the material can even direct water upward, against gravity.

 

How Magnets Produce Electricity 1954 US Navy Electromagnetism Prime

How a magnetic field effects a single atom, a group of atoms and a wire in a closed circuit with a meter.

 US Navy training film MN-8016b

 

Hewitt-Drew-it! 100. Circuit Medley

A summary of electric circuits.

Electrostatic Precipitator/Smoke Precipitator - How it Works/How to Make

This electrostatic precipitator, or smoke precipitator, gets rid of most smoke by using high voltage to collect smoke particles. This shows how the electrostatic precipitator works and how to make your own electrostatic precipitator.

Hewitt-Drew-it! PHYSICS 99. Car Battery Power

A summary of current, voltage, resistance and power.

 

Hewitt-Drew-it! PHYSICS 98. Battery Demo

Circuit features featuring a car battery and bulbs.

 

How Modern Light Bulbs Work

Incadescent lamps, halogen lamps, fluorescent lamps, vapor lamps, LED.

Hewitt-Drew-it! PHYSICS 97. Circuit Resistances

Finding equivalent resistances for complex circuits.

 

Hewitt-Drew-it! PHYSICS 96. Equivalent Resistance

Rules for equivalent resistance for series and parallel circuits explained.

 

Hewitt-Drew-it! PHYSICS 95. Electric Power

Battery and brightness of bulbs explained.

 

Hewitt-Drew-it! PHYSICS 94. Bulbs in Parallel

The rules of parallel circuits illustrated.

 

Hewitt-Drew-it! PHYSICS 93. Water and Electron Circuits

The similarities and differences between electric and hydraulic circuits.

 

Hewitt-Drew-it! PHYSICS 92. Voltage Drop

Why the sum of the voltages across bulbs in series adds to battery voltage.

 

Collin's Lab: Multimeters

Adafruit's new series of videos with Collin Cunningham is here! Collin's Lab: Multimeters! The multimeter is your greatest ally when working with electronics. Learn how to measure voltage, resistance, current, & continuity - as well as which meter works best for specific tasks.

 

Licking a 9 Volt Battery

SparkFun engineer Shawn breaks down the science behind the tingling sensation you get when licking a 9 volt battery.

 

Hewitt-Drew-it! PHYSICS 91. Ohm's Law

Battery and bulb to explain, with numerical examples.

 

Hewitt-Drew-it! PHYSICS 90. Electric Potential

Compared with electric potential energy, with novel situations.