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PlayOwl

Science · Grade 11

Circuits and Electrical Energy

Learners treat current as a flow of conserved charge driven by a potential difference, use Ohm's law and current–voltage graphs to distinguish ohmic resistors from filament lamps, and apply the rules of series and parallel circuits, including combinations. They calculate electrical power, energy and cost in kilowatt-hours, then use a deliberately simplified bulb simulation, compare its predictions with real lamp data, and reason about parallel household wiring and fuses.

  • 5 lessons
  • About 125 minutes
  • Circuits and electrical energy check: 10 questions
  • Ways to answer: choose an answer, draw a graph, match pairs, type a number, sort into groups and true or false
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What learners will discover

  • Define current (I = Q/t), potential difference and resistance; apply Ohm's law (V = IR); and interpret current–voltage graphs for ohmic resistors and filament lamps.
  • Apply the current and potential-difference rules for series and parallel circuits and calculate equivalent resistance, including simple combination circuits.
  • Calculate electrical power (P = IV = I²R = V²/R), energy (E = Pt) and the cost of energy in kilowatt-hours.
  • Use a simplified circuit model to compare series and parallel lamps, evaluate the model against real lamp data and P = V²/R, and explain why household circuits are wired in parallel with fuses.

Lessons

  1. Current and potential difference 9 steps5 practiceabout 22 min
  2. Resistance and Ohm's law 8 steps5 practiceabout 24 min
  3. Series and parallel circuits 9 steps5 practiceabout 27 min
  4. Electrical power, energy and cost 9 steps6 practiceabout 24 min
  5. Modelling lamps and wiring homes 8 steps5 practiceabout 25 min
  6. Circuits and electrical energy check 10 questions at the end

Keep exploring

More 11th grade science

Guide for grown-ups