EM_electricMotorsExplained

What is the main purpose of a DC motor?

• convert DC electric into AC electricity

• convert electrical energy into mechanical energy

• to teach Tesla what American jokes are

• to convert chemical energy into electrical energy

Which of the following can you see on the outside of a DC electric motor? (pick 3)

• windings

• stator

• shaft

• terminals

What parts would you only find inside an electric motor? (not visible outside)

• terminal

• brushes

• commutator

• coil

Where have you seen/ used a DC motor in the last week?

How many directions does DC current run in?

(a)  

How do you make the electrons in a circuit move?

• connect them to a water source

• connect them to a battery or other power source

• create a chemical reaction

• electrons don't move

What is the difference between electron flow and convential current?

What is the purpose of the perminate magnets in the motor?

• hold the components of the motor together

• save space and eventually join Mrs. B's board collection

• create a strong magnetic field around the rotor

• to allow the motor to stick to a metal surface

What happens on the outside of a copper wire when a current runs through it?

• An  electromagnetic field is created

• It creates a cooling effect

• It electrifies the surrounding air

• Nothing happens, electricity only flows through the wire, air is a primo insulator

Why do you need to coil the wire when making an electromagnet?

• 
  

  To increase the strength of the magnetic field

• 
  

  To increase the current to the load

• To make the electricity stronger

• To generate the necessary heat energy to pass electrical current