This exam tips covers Exam Tips for Current and Charge within Current & Charge for GCSE Physics. Revise Current & Charge in Electricity for GCSE Physics with 19 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 12 of 13 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 12 of 13
Practice
19 questions
Recall
30 flashcards
💡 Exam Tips for Current and Charge
🎯 Common Question Types:
- Calculate charge using Q = It (1–2 marks)
- Rearrange Q = It for current or time (2 marks)
- Explain how to connect an ammeter (2 marks)
- Describe what current measures and its unit (1 mark)
- Explain why conventional current opposes electron flow (2 marks)
📝 Key Command Words:
- State — one-word or one-line answers only
- Describe — say what happens, not why
- Explain — give the reason using physics terminology
- Calculate — show substitution and give units
⚠️ Common Mistakes to Avoid:
- Forgetting to state units (C for charge, A for current, s for time)
- Saying current is "used up" — it is conserved in a series circuit
- Connecting an ammeter in parallel instead of series
- Confusing electron flow direction with conventional current direction
- Mixing up Q = It with V = It (wrong equation altogether)
Quick Check: A charge of 120 C passes through a resistor in 2 minutes. What is the current?
Convert time: 2 minutes = 120 s. Use I = Q/t = 120 ÷ 120 = 1 A.