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Grade 11 Diode and LED Circuit Exercise

Revision activities / Electricity study practice

Learning focus: Electronics. 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 diode primarily conducts in one direction. An LED emits light when correctly forward biased and requires current limiting in a suitable teaching circuit.

Try the activity

A 5 V source feeds an LED with an assumed 2 V forward drop at 0.01 A. Estimate the series resistor.

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 resistor must drop 5 − 2 = 3 V. R = V/I = 3/0.01 = 300 Ω. An actual design also considers component tolerances, LED specifications and resistor power.

Follow-up challenge

Calculate the resistor’s power using I²R. Draw polarity labels. Treat the example as a calculation; practical work requires a supervised low-voltage setup.

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.