Pre Assessment Simple Electric Motor and Generator

Which of the following principles explains how an electric motors works?

• A. magnetic force

• B. magnetism

• C. electrolysis

• D. electromagnetism

Which is NOT a distinguishing feature of an electric generator?

• A. Electric generator converts mechanical energy into electrical.

• B. Electric generator converts electrical energy into mechanical energy.

• C. It generates electricity.

• D. It is based on the principle of electromagnetic induction.

What do we call a device that converts electricity into mechanical movement?

• A. electric charge

• B. electric motor

• C. electric current

• D. electric generator

4. What do you call a device that converts mechanical movement into electricity?

• A. electric field

• B. electric motor

• C. electric generator

• D. electric plasma

5. Which of the following situations illustrate how a simple electric motor works?

• A. The energy stored in the car’s batteries is converted into the rotation of the wheels.

• B. Electrical energy turned into rotation of the blades in the food processor and cut up food.

• C. Both A and B

• D. None of these

6. Which of the following is a device that converts electrical energy into mechanical energy?

• A. vacuum cleaner

• B. bicycle

• C. weighing scale

• D. all of the above

7. What two forces are required for generators and electric motors to work?

• A. magnetic and thermal

• B. magnetic and radiant

• C. electric and thermal

• D. electric and magnetic

8. What would happen to the coiled wire in an electric motor model if there is a repulsion and attraction of the magnetic poles?

• A. The coil fluctuates and converts electrical energy into chemical energy.

• B. The coil stops and changes mechanical energy into electrical energy.

• C. The coil rotates and changes electrical energy into mechanical energy.

• D. The coil remains stable.

What do you call a huge wheel that rotates when pushed by water, wind, or steam (associated with generators)?

• A. Turbine

• B. Magnet

• C. Motor

• D. Pipe

He was credited for his discovery of electromagnetic induction.

• A. Thomas Edison

• B. Benjamin Franklin

• C. Nikola Tesla

• D. Michael Faraday