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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
In the mirror formula 1/v + 1/u = 1/f, what do the symbols u, v, and f represent? Which of these quantities is fixed for a given mirror?
Generated by claude-sonnet-4-6 · 2026-06-26 01:10 · grounding rag
Model Answer

u = object distance, v = image distance, f = focal length of the mirror. f is fixed for a given mirror.

Source: Chapter 9, Section 9.2.4

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Explanation

The examiner expects all three symbols defined correctly in one line, plus identification of f as the fixed quantity. Focal length depends only on the mirror's geometry (f = R/2), so it does not change regardless of where the object is placed. u and v both vary with object position.

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