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- 1. Multiple Choice
Which of the following principles explains how an electric motors works?
magnetic force
magnetism
electromagnetic induction
electromagnetism
- 2. Multiple Choice
Which is NOT a distinguishing feature of an electric generator?
It is based on the principle of electromagnetic induction.
It generates electricity.
Electric generator converts electrical energy into mechanical energy.
Electric generator converts mechanical energy into electrical.
- 3. Multiple Choice
What do we call a device that converts electricity into mechanical movement?
electric charge
electric motor
electric current
electric generator
- 4. Multiple Choice
What do you call a device that converts mechanical movement into electricity?
electric field
electric generator
electric plasma
electric motor
- 5. Multiple Choice
Which of the following situations illustrate how a simple electric motor works?
The mechanical stored in the car’s batteries is converted into the rotation of the wheels.
Electrical energy turned into rotation of the blades in the food processor and cut up food.
Chemical energy turned into rotation of the blades in the food processor and cut up food.
None of these
- 6. Multiple Choice
Which of the following is a device that converts electrical energy into mechanical energy?
vacuum cleaner
bicycle
weighing scale
all of the above
- 7. Multiple Choice
What two forces are required for generators and electric motors to work?
magnetic and thermal
electric and thermal
electric and magnetic
magnetic and radiant
- 8. Multiple Choice
What would happen to the coiled wire in an electric motor model if there is a repulsion and attraction of the magnetic poles?
The coil fluctuates and converts electrical energy into chemical energy.
The coil stops and changes mechanical energy into electrical energy.
The coil rotates and changes electrical energy into mechanical energy.
The coil remains stable.
- 9. Multiple Choice
What do you call a huge wheel that rotates when pushed by water, wind, or steam (associated with generators)?
Turbine
Magnet
Motor
Pipe
- 10. Multiple Choice
What do you call a devise that produces an electric current when a coil of wire is wrapped around an iron core and rotated near a magnet?
motor
magnet
rotor
generator
- 11. Multiple Choice
He was credited for his discovery of electromagnetic induction.
Thomas Edison
Hans Christian Ørsted
Michael Faraday
Benjamin Franklin
- 12. Multiple Choice
Which of these kitchen appliances have an electric motor?
water filter
refrigerator
clock
all of the above
- 13. Multiple Choice
Which of the following is the correct description of the operation of an electric motor?
The operation is based on the principle of electromagnetic induction.
The motor converts mechanical energy into electrical energy.
Electric motor uses electricity.
All of the above
- 14. Multiple Choice
Electricity is produced in the ______________.
motor
generator
- 15. Multiple Choice
The ________________ transforms mechanical into electrical energy.
motor
generator
- 16. Multiple Choice
Which is the correct sequence in the operation of simple motor?
I. Magnets placed near one another either attract or repel.
II. The attraction and repulsion causes the wire to jump.
III. Electric current starts to creep along wire; it creates a magnetic field all around it.
IV. Electrical energy converted to mechanical energy.
V. Temporary magnetic field interacts with the permanent magnet
V, IV, II, II, I
III, II, IV, I, V
III, V, I, II, IV
V, III, I, IV, III
- 17. Multiple Choice
He was credited for discovering that electric currents create magnetic fields, which was the first connection found between electricity and magnetism.
James Maxwell
Michael Faraday
Alessandro Volta
Hans Christian Ørsted
- 18. Multiple Choice
Which is the correct sequence in the operation of generator in the production of electricity in Hydroelectric Power Plant?
I. A turbine converts the kinetic energy of the falling water into mechanical energy.
II. Hydropower plants capture the energy of falling water to generate electricity.
III. Once an electrical current has been established, it is directed through copper wires to power machines and devices.
IV. The generator converts the mechanical energy from the turbine into electrical energy.
IV, I, III, II
III, II, IV, I
II, I, IV, III
I, IV, II, III
- 19. Multiple Choice
Electricity is used in the ______________.
motor
generator
- 20. Multiple Choice
Which of the following principles explains how an electric generator works?
magnetic force
magnetism
electromagnetic induction
electromagnetism
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