Electricity and Magnetism

Where this fits in the syllabus

Grade 10 · Term 3 · Grade 11 · Term 1

Key points to revise

Revise Electricity and Magnetism fast with concise, exam-ready key points

About O/L Science: O/L Science integrates physics, chemistry, and biology into a single subject across Grade 10 and 11.

• Current I (Amp) = charge Q / time t; Q = It
• Ohm's Law: V = IR (voltage = current × resistance)
• Series circuit: same current; voltages add; resistances add
• Parallel circuit: same voltage; currents add; 1/R_total = 1/R₁ + 1/R₂ ...
• Electrical power P = IV = I²R = V²/R; Energy = Pt

Must know

• Power: P = IV = I²R = V²/R; unit = Watt (W)
• Series: same I throughout; V_total = V₁ + V₂; R_total = R₁ + R₂
• Parallel: same V across branches; I_total = I₁ + I₂; 1/R_total = 1/R₁ + 1/R₂
• Household wiring = parallel (each appliance gets full voltage)
• Fuse/circuit breaker: protects circuit from excess current

Source: NIE O/L Science Grade 10 — Unit 8: Electricity and Circuits

Builds toward

Related Topics

In the Syllabus