📚 CBSE Grade-10 Study Guide
Home › Science (086) (AI practice)

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 exam-ready
The commercial unit of electrical energy, 1 kWh, is equal to: (A) 1000 J (B) 3.6 × 10⁴ J (C) 3.6 × 10⁶ J (D) 3.6 × 10⁸ J
  1. A 1000 J
  2. B 3.6 × 10³ J
  3. C 3.6 × 10⁶ J
  4. D 3.6 × 10⁴ J
Generated by claude-sonnet-4-6 · 2026-06-26 01:08 · grounding rag
Model Answer

(C) 3.6 × 10⁶ J

1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J.

Explanation

The key calculation: multiply 1000 watts by 3600 seconds (1 hour). Examiners expect you to know this conversion directly. Option C is correct as stated in the textbook passage.

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