Physics — Electricity and Circuits

Exam board: WJEC  |  Back to subjects

Board-Specific Note

WJEC specification; mainly taken in Wales.

Learning Objectives

• Apply Ohm's law
• Combine resistors in series and parallel
• Work with power and energy

Key Points

• V = IR
• Series R = R₁+R₂, parallel 1/R = 1/R₁+1/R₂
• P = IV = I²R

Lesson Plan (50 minutes)

1. Starter (5 min): Recall prior knowledge of electricity and circuits with quick questions.
2. Teaching (15 min): Work through each of the learning objectives, explaining principles step by step.
3. Key points review (5 min): Revisit the key points together, confirming understanding.
4. Worked example (10 min): Model the example question: Current through a 6 V, 12 Ω lamp?. Solution: I = 6/12 = 0.5 A
5. Practice (10 min): Students attempt the practice questions independently; circulate and support.
6. Plenary (5 min): Review answers and address misconceptions.

Homework

• Two 4 Ω resistors in series, total resistance?
• Power of a 2 A device at 12 V
• Voltage across a 3 Ω resistor carrying 2 A

Assessment

Check practice answers against the model answer; use the built-in practice questions as formative assessment.