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Difficulty: EasyElectricity and Magnetism

Electromagnetic principles are applied in many common electrical machines and tools. Match each device with its primary operational function.

  • Electric GeneratorConverts mechanical energy into electrical energy using electromagnetic induction
  • Electric MotorConverts electrical energy into mechanical rotational movement
  • TransformerIncreases or decreases alternating current (AC) voltage levels
  • ElectromagnetProduces a controllable magnetic field when an electric current passes through a coil

Answer

Electric Generator matches with converting mechanical energy to electrical energy; Electric Motor matches with converting electrical energy to mechanical rotation; Transformer matches with adjusting alternating current voltage levels; Electromagnet matches with producing a controllable magnetic field from electric current.
Each electromagnetic device corresponds directly to its defined operational function: generators convert mechanical work into electricity, motors convert electricity into mechanical rotation, transformers step AC voltage up or down, and electromagnets create temporary magnetic fields via electric current.

Step-by-Step Solution

1
Identify the energy transformation in an electric generator.
Mechanical energy is converted into electrical energy via induction.
Generators are driven by mechanical power to produce current.
2
Identify the energy transformation in an electric motor.
Electrical energy is converted into mechanical motion.
Motors consume electricity to produce physical torque and rotation.
3
Identify the primary role of a transformer in power distribution.
Voltage levels of alternating current are increased or decreased.
Transformers rely on changing magnetic flux between primary and secondary coils to adjust voltage.
4
Identify the mechanism of an electromagnet.
Current flowing through a coil creates a magnetic field.
Moving electric charges naturally produce magnetic fields around the coil.

Key Concept

Electromagnetic Devices and Energy Transformations
Estimated Time:45s
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Topics

Electricity and Magnetism

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