Data Sheet

-39-
47. First Electric Motor
Build the circuit shown on the left, turn on the switch (62) and you
can see the motor (95) start spinning, and the two LEDs are turned
on dimly at the same lime. Did you know that Michael Faraday made
the rst electric motor using a nail, a wire, a spindle, a magnet, and a
battery? Can you gure out how he did it?
48. The Dynamo and Generator
Build the circuit shown on the left and you will see the motor (95) spin
and the star LED (70) turn on, but the lamp (76) will be very dim.
Because the lamp (76) and the star LED (70) are connected in series,
the current that passes though the lamp is limited by the internal
resistance in the star LED (70). It was discussed in project #4 how the
motor converts electrical energy to mechanical energy. On the other
hand, a device that converts mechanical energy to electrical energy is
called a dynamo or generator.
WARNING: Moving parts. Do not
touch the motor during operation. Do
not lean over the motor.
!
WARNING: Moving parts. Do not
touch the motor during operation. Do
not lean over the motor.
!