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Grade 11 Motor and Generator Comparison

Revision activities / Electricity study practice

Learning focus: Electrical Machines. This original Grade 11 Electricity exercise gives you a task, a suggested response and a follow-up challenge. It is classroom practice, not an official assessment paper.

Understand the idea

A motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy. Both involve electromagnetic principles but their energy inputs differ.

Try the activity

Compare a fan motor and a hand-driven generator by input, useful output and one energy loss.

Attempt your response before opening the guidance. Show the steps, textual evidence or reasons that support your answer; a final answer alone may hide a misunderstanding.

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Self-assessment checklist

This is your own assessment, not automatic marking.

Self-assessed checklist: 0/4

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Show suggested answer and reasoning

The fan motor receives electrical energy and produces rotating mechanical motion. The hand-driven generator receives mechanical energy and produces electrical energy. Both can lose useful energy through heating, sound and friction.

Follow-up challenge

Draw energy-flow diagrams with losses. Explain why a generator cannot supply energy indefinitely without an energy input.

Review your work

  • Did you answer the question actually asked?
  • Can you explain the method or evidence in your own words?
  • What would you change if one condition in the task changed?

Use the suggested response to identify one correction, then attempt the task again without copying it. For an open-ended question, other well-supported answers may be reasonable. Ask your teacher to check interpretations or language forms where needed.

Continue Electricity practice

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Match this activity to the learning outcomes and sequence in your school’s current Grade 11 curriculum-design collection. This activity is a focused learning example, not a complete curriculum map.