A summary of current, voltage, resistance and power.
Friday, 28 February 2014
Tuesday, 25 February 2014
Sunday, 23 February 2014
Saturday, 22 February 2014
Hewitt-Drew-it! PHYSICS 97. Circuit Resistances
Finding equivalent resistances for complex circuits.
How do figure skaters exploit Newtonian physics when they spin?
Legendary MIT physics professor Walter Lewin describes some of the science that was in action during the Winter Olympics in Sochi. He explains how ice-skaters use their arms to moderate their moment of inertia, which in turn affects the angular velocity of their spins. The biomechanics is fairly straightforward, but Walter Lewin always manages to make his lessons engaging thanks to his trademark charisma.
Wednesday, 19 February 2014
Hewitt-Drew-it! PHYSICS 96. Equivalent Resistance
Rules for equivalent resistance for series and parallel circuits explained.
Sunday, 16 February 2014
Thursday, 13 February 2014
Monday, 10 February 2014
Hewitt-Drew-it! PHYSICS 93. Water and Electron Circuits
The similarities and differences between electric and hydraulic circuits.
Friday, 7 February 2014
Hewitt-Drew-it! PHYSICS 92. Voltage Drop
Why the sum of the voltages across bulbs in series adds to battery voltage.
Tuesday, 4 February 2014
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.
Saturday, 1 February 2014
Hewitt-Drew-it! PHYSICS 90. Electric Potential
Compared with electric potential energy, with novel situations.
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