9th Physics Chapter1 Physical Quantities and Measurement
| Sr # | Questions | A | B | C | D |
|---|---|---|---|---|---|
| 1 | Express the number 24,500 in scientific notation. | 2.45 × 10^4 | 24.5 × 10^3 | 245 × 10^2 | 2450 × 10^1 | 2 | Which of the following numbers show 4 significant digits? | 900.8 | 4 | 5174.00 | 0.001248 | 3 | Which of the following is a base unit? | pascal | coulomb | metre per second | mole | 4 | 94.83 x 10^3 m is the standard form of . | 94.83 m | 9.483 m | 948.3 m | 9483 m | 5 | Which of the following quantity can be measured using a micrometre? | current | force | length | mass | 6 | A measuring cylinder is used to measure: | mass | area | volume | Volume of a liquid. | 7 | Ratio of millimetre to micrometre is . | 1000 metre | 0.001 metre | 1000 | 0.001 | 8 | The number of base units in SI are: | 3 | 6 | 7 | 9 | 9 | The instrument best measures the internal diametre of a pipe is . | screw gauge | vernier caliper | metre rule | measuring taps | 10 | which of the one following is the smallest quantity? | 0.01g | 2mg | 100ug | 5000ng | 11 | Write the number 6,250,000 in scientific notation. | 6.25 × 10^5 | 6.25 × 10^6 | 62.5 × 10^5 | 625 × 10^4 | 12 | Convert 3,750,000,000,000 to scientific notation. | 3.75 × 10^12 | 37.5 × 10^11 | 375 × 10^10 | 3750 × 10^9 |