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CXC · CSEC · Physics

Electrical Power, Energy and Heating Effect
Practice Questions

20 CXC CSEC Physics questions on Electrical Power, Energy and Heating Effect, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Electrical Power, Energy and Heating Effect.

Try 2 sample questions on Electrical Power, Energy and Heating Effect

Question 1 · 1 mark · Difficulty 1/3

A 12 V electric drill draws a current of 4 A. What is the power rating of the drill?

  1. 3 W
  2. 16 W
  3. 48 W
  4. 192 W
Show answer & explanation
✓ Answer: C48 W
Award 1 mark for correct calculation. Using P = VI, P = 12 V × 4 A = 48 W. A is incorrect because it divides V by I. B is incorrect because it adds V and I. D is incorrect due to calculation error.
Question 2 · 1 mark · Difficulty 1/3

Which of the following equations correctly represents electrical power?

  1. P = V/I
  2. P = I/V
  3. P = VI
  4. P = V + I
Show answer & explanation
✓ Answer: CP = VI
Award 1 mark for correct formula. Power equals voltage multiplied by current. A is incorrect because it gives resistance (R = V/I). B is incorrect and dimensionally inconsistent. D is incorrect because power is not the sum of voltage and current.
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20 questions · 25 min · free

CXC CSEC Physics: Electrical Power, Energy and Heating Effect FAQ

How many CXC CSEC Physics questions on Electrical Power, Energy and Heating Effect are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Electrical Power, Energy and Heating Effect for CXC CSEC Physics, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Physics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Electrical Power, Energy and Heating Effect practice with other Physics topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Electrical Power, Energy and Heating Effect questions aligned to the official CXC CSEC Physics syllabus?
Every question is written against the published CXC CSEC Physics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Electrical Power, Energy and Heating Effect typically tested on CXC CSEC Physics papers?
Electrical Power, Energy and Heating Effect appears across multiple question types on real CXC CSEC Physics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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