Physics · Grade 9 · Chapter 1

Physics · Grade 9 · Chapter 1 — Unit Model Paper

Part A · Multiple Choice Questions

Prepare from the portal — not printed here

How to prepare Part A

→ Unit 1 MCQs — full chapter bank (SI units, prefixes, scalars/vectors, least count, significant figures)

→ Online Quiz — timed self-test

→ Flashcards — quick revision of the seven base quantities, prefixes and definitions

Part B · Short Questions

Likely / important — 10 identified from the Unit 1 notes

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1. Define a physical quantity and a non-physical quantity. Give one example of each.

SLO PHY-09-1.2

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2. Differentiate between base and derived quantities, giving one example of each.

SLO PHY-09-1.3

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3. Express 3,650,000 s and 0.000000017 m in scientific notation, and state the rule for the mantissa.

SLO PHY-09-1.4

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4. Differentiate between scalar and vector quantities. Classify: displacement, speed, force, mass.

SLO PHY-09-1.6

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5. Define least count. Calculate the least count of a Vernier caliper whose smallest main-scale division is 1 mm with 10 vernier divisions.

SLO PHY-09-1.7

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6. Differentiate between systematic and random errors.

SLO PHY-09-1.8

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7. Differentiate between precision and accuracy, using the darts analogy.

SLO PHY-09-1.9

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8. State the seven SI base quantities along with their base units.

SLO PHY-09-1.3

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9. State the four rules of significant figures. How many significant figures are there in 0.00290?

SLO PHY-09-1.10

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10. Define a prefix. Give the power of ten represented by kilo, mega, micro and nano.

SLO PHY-09-1.5

Part C · Long Questions

4 per chapter — drawn from the Unit 1 notes

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Q1. Vernier caliper — measuring small lengths accurately.

(a) Define least count, state the principle of the Vernier caliper, derive its least count, and draw a neat, fully-labelled diagram. (b) The main scale reads 2.4 cm and the 7th vernier division coincides (LC = 0.1 mm); find the reading.

SLO PHY-09-1.7

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Q2. Scalars, vectors and vector addition.

(a) Differentiate between scalar and vector quantities and state the head-to-tail rule of vector addition. (b) A force of 30 N acts towards the East and 40 N towards the North at the same point; find the magnitude and direction of the resultant.

SLO PHY-09-1.6

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Q3. Errors and reliability of measurement.

(a) Differentiate between systematic and random errors and state one way to reduce each. (b) Differentiate between precision and accuracy, with an example of a measurement that is precise but not accurate.

SLO PHY-09-1.8

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Q4. SI system and scientific notation.

(a) Differentiate between base and derived quantities, and express the units of force and pressure in terms of base units. (b) The mass of Earth is 5,980,000,000,000,000,000,000,000 kg; express it in scientific notation and state the mantissa rule.

SLO PHY-09-1.4

Part D · Board Marking Pattern

How the actual FBISE SSC-I paper is structured and marked (SLO-based)

Section

Attempt

Marks

A — MCQs

All 12 (compulsory)

B & C — Short questions

As directed on paper

D — Long / detailed questions

As directed on paper

Total (theory)

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Section A ≈ 20%, short questions ≈ 50%, long questions ≈ 30%. A separate practical of 15 marks is assessed on its own. Confirm exact counts against the current FBISE official model paper.

📃 Chapter 1 · Physical Quantities and Measurement — Chapter Model Paper

Chapter 1: Physical Quantities and Measurement Model Paper