Lesson Plan

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Lesson Plan
Grade: Date: 18/01/2026
Subject: Physics
Lesson Topic: Recall and use the equation for electrical energy E = I V t
Learning Objective/s:
  • Recall the formula E = I V t and identify each variable and its unit.
  • Apply Ohm’s Law (V = I R) to determine voltage, current or resistance in simple circuits.
  • Calculate electrical power and energy transferred in a circuit using P = IV and E = P t.
  • Analyse a given circuit problem, select the appropriate equations, and solve for the required quantity.
Materials Needed:
  • Projector or interactive whiteboard
  • Printed worksheet with practice questions
  • Resistor kit, battery pack, ammeter and voltmeter (or virtual circuit simulator)
  • Scientific calculators
  • Handout summarising formulas (Ohm’s Law, power, energy)
 Introduction:
Begin with a quick demonstration of a heater turning on, asking students what determines how much energy it uses. Review that they already know Ohm’s Law and the definition of power. State that by the end of the lesson they will be able to use E = I V t to predict energy consumption in everyday devices.
Lesson Structure:
  1. Do‑Now (5'): Students complete a short quiz on current, voltage and resistance symbols.
  2. Mini‑lecture (10'): Derive E = I V t from Ohm’s Law and power, using the board and projector.
  3. Guided practice (12'): Work through the heater example step‑by‑step, highlighting unit conversions.
  4. Hands‑on activity (15'): In pairs, students use the resistor kit or simulator to measure I and V, then calculate P and E for different resistances and times.
  5. Check for understanding (5'): Quick exit question – “If you double the voltage while keeping resistance constant, how does the energy used in a given time change?”
  6. Independent practice (8'): Students attempt the three practice questions on the worksheet, teacher circulates to provide feedback.
  7. Wrap‑up (5'): Review key steps and address common mistakes (unit conversion, symbol confusion).
Conclusion:
Recap that energy in a circuit depends on current, voltage and the duration of flow, and that the same result can be reached via power or resistance relationships. Students complete an exit ticket writing the energy formula and a brief example calculation. Assign homework: two additional circuit problems requiring use of E = I V t.