Units and Measurements · Class 11 Physics · Chapter 1
⚛ Units and Measurements
CBSE Class 11 Science · Physics · Chapter 1
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📖Notes Deck
Full lecture deck with teaching paragraphs, misconception red-boxes, and glossary. Read this first.
Download PDF →📝Quick Drill
15 pattern-tagged MCQs with per-Q time budget. Drill under a 20-min timer.
Download PDF →📄Exam Paper
Full exam-pattern paper with sections. Sit it closed-book before checking the marking scheme.
Download PDF →✅Marking Scheme + Topper Templates
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Download PDF →⚡Cheat Sheet
1-page exam-day card: key points, top question patterns, 90-minute revision flow.
Download PDF →👨👩👧For Parents
1-page plain-language parent guide: what's being learned + questions to ask your child.
Download PDF →Top question patterns · CBSE annual / SQP aggregate
| 90% | Maximum percentage error in Z = A^a B^b / C^c — Multiply each % error by |exponent|, then ADD. Never subtract for a denominator term. | 3 MARKS |
| 75% | Check dimensional correctness of v^2 = u^2 + 2as — Find dimensions of EACH whole term; show all equal L^2T^-2; cite homogeneity + caveat. | 3 MARKS |
| 80% | Count significant figures and round the result — Leading zeros never count; trailing zeros count only with a decimal point. Round to least-precise input. | 2 MARKS |
| 55% | Derive a relation by dimensions (e.g. T = 2π√(l/g)) — Assume T ∝ l^a g^b m^c, equate M,L,T powers, solve. State the 2π must be added separately. | 3 MARKS |
| 60% | Accuracy vs precision OR systematic vs random with example — Accuracy = closeness to true value; precision = closeness of repeats. Give the fast-clock example. | 2 MARKS |
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