Choose a, b, c, or d for the correct answer.

Electric Fan

Electronic motors can make things move. A washing machine, for example, has a powerful electric motor to move the washing around. Why not set up a circuit with an electric motor that drives an electric fan to keep you cool?

To make an electric fan, you will need:

• a small electric motor
• a battery
• 2 small blocks of wood
• 3 wires
• a thick block of wood
• a plastic propeller
• a large, metal paper clip
• 2 metal drawing pins
• glue and sticky tape

Steps

1. Glue the thick block of wood to one of the small blocks.
2. Glue the motor to the top of the thick block. Push the propeller onto the spindle of the motor.
3. Connect two wires to the motor. Make a paperclip switch with the other small block of wood.
4. Connect one wire from the motor to the battery and the other to the switch.
   Connect the battery and switch. To start a fan, turn the paperclip so it touches the drawing pin.

What is the purpose of the experiment?