P4.2.2 - Motors Flashcards
Describe how to make a simple motor.
Make a piece of wire into a loop, and place it into a magnetic field. When you connect this to a battery, the current flows, and one side of the wire goes up while the other goes down. However, the coil will start to rotate back the other way as soon as it passes the vertical position
What do you need to keep the current moving in on the right and out on the left all the time?
Split-ring commutator
What does the split-ring commutator enable?
The current to flow the same way as the battery, but change to different halves of the coil as it spins
How can you change the speed of a motor?
Change current magnitude
Change magnetic field strength
Change number of coils
Change length of coil