9th Physics Chapter1 Physical Quantities and Measurement
| Sr # | Questions | A | B | C | D |
|---|---|---|---|---|---|
| 1 | Which of the following numbers show 4 significant digits? | 900.8 | 4 | 5174.00 | 0.001248 | 2 | Which of following prefix represents a largest value ? | mega | pico | peta | kilo | 3 | Express the number 24,500 in scientific notation. | 2.45 × 10^4 | 24.5 × 10^3 | 245 × 10^2 | 2450 × 10^1 | 4 | Write the number 6,250,000 in scientific notation. | 6.25 × 10^5 | 6.25 × 10^6 | 62.5 × 10^5 | 625 × 10^4 | 5 | A student claimed the diammeter of a wire as 1.032 cm using vernie callipers. Upto what extent do you agree with it? | 1cm | 1.0cm | 1.03cm | 1.032cm | 6 | Amount of a substance in terms of numbers is measured in : | gram | kilogramme | newton | mole | 7 | How many significant figures are in 0.00350s? | 2 | 3 | 5 | 6 | 8 | The instrument best measures the internal diametre of a pipe is . | screw gauge | vernier caliper | metre rule | measuring taps | 9 | Which of the following is a base unit? | pascal | coulomb | metre per second | mole | 10 | An interval of 200us is equivalent to | 0.2s | 0.02s | 2x10^-3 | 2x10^-4 | 11 | 94.83 x 10^3 m is the standard form of . | 94.83 m | 9.483 m | 948.3 m | 9483 m | 12 | Which of the following quantity can be measured using a micrometre? | current | force | length | mass | 13 | Ratio of millimetre to micrometre is . | 1000 metre | 0.001 metre | 1000 | 0.001 | 14 | Convert 3,750,000,000,000 to scientific notation. | 3.75 × 10^12 | 37.5 × 10^11 | 375 × 10^10 | 3750 × 10^9 | 15 | Lest count of screw gauge is 0.01 mm.if main scale reading of screw gauge is zero and third line of its circular scale conicides whith datum line then the measurement on the screw gauge is : | 0 mm | 3 mm | 0.03 mm | 0.3 mm | 16 | Write 0.00000796 in scientific notation. | 7.96 × 10^-6 | 79.6 × 10^-7 | 796 × 10^-8 | 0.0796 × 10^-4 | 17 | 0.2 mm in units of metres is . | 0.0002 m | 2x10^3 | 0.02 m | 0.002 m | 18 | whch instrument is most suitable to measure the internal diameter of a test tube? | metre rule | vernier callipers | measuring tap | screw gauge | 19 | Which one of the following unit is not a derived unit? | pascal | kilogramme | newton | watt | 20 | which of the one following is the smallest quantity? | 0.01g | 2mg | 100ug | 5000ng | 21 | Which of the following numbers show one significant digit? | 1.1 | 6.0 | 7.1 | 6x10^3 | 22 | A measuring cylinder is used to measure: | mass | area | volume | Volume of a liquid. | 23 | Express 0.00042 in scientific notation. | 4.2 × 10^-4 | 42 × 10^-5 | 420 × 10^-6 | 0.042 × 10^-3 | 24 | The number of base units in SI are: | 3 | 6 | 7 | 9 |