📚 CBSE Grade-10 Study Guide
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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] straightforward initial-understanding
Which of the following expressions correctly represents the electric power consumed in a circuit? (A) P = VI (B) P = V²/R (C) P = I²R (D) P = IR²
  1. A VI
  2. B I²R
  3. C IR²
  4. D V²/R
Generated by claude-sonnet-4-6 · 2026-06-26 01:08 · grounding rag
Model Answer

The expressions that correctly represent electric power consumed in a circuit are P = VI, P = I²R, and P = V²/R.

Therefore, the option that does not represent electrical power is (D) P = IR².

Since the question asks which correctly represents electric power, options (A) P = VI, (B) P = I²R, and (D) P = V²/R are all correct. IR² is incorrect.

The correct answer is (D) IR² does not represent power; thus among the given options, A (VI), B (I²R), and D (V²/R) are valid expressions.

Best single answer: (D) IR² is the odd one out; all others are correct power formulae.

Source: Chapter 11, Section 11.8 Electric Power

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Explanation

The textbook (Section 11.8) states P = VI = I²R = V²/R as valid expressions for electric power. The term IR² has no physical basis — resistance is squared instead of current, so it does not give power. This mirrors Exercise Q2 which asks which term does not represent electrical power, with IR² as the answer. In the MCQ framing here, IR² is the incorrect/false expression, so if the question asks which correctly represents power, avoid IR².

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.