Day 4
Below is a YouTube video on the basics of a DC motor. Take notes on the 4 main parts of a DC motor. You will need to identify these parts in both the simple motor you built on day 3 and the motor you dissect today.
Below is a YouTube video on the basics of a DC motor. Take notes on the 4 main parts of a DC motor. You will need to identify these parts in both the simple motor you built on day 3 and the motor you dissect today.
Dissect a small electric motor.
Test the small DC motor by connecting it to a 1.5 V battery. After confirming that it works, carefully take it apart and make a drawing comparing the parts you find in this motor to the one you built on day 3. Identify which parts are similar and which are unique in one or the other. At the minimum, label the rotor, the stator, the commutator, and the brushes in each motor using this Worksheet.
If you have time and are interested in the mathematical details for describing how motors work, check out the Khan Academy videos on electric motors:
If you aren't familiar with cross products and magnetic fields, watch these first: