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| Physics 9th Chapter 1 Physical Quantities and Measurement Questions |
Chapter 1: Physical Quantities and Measurement MCQs
Choose the right answer
1. _______can accurately measure up to one tenth of a millimeter.
2. 1.35 is rounded off as:
3. 1µs is equal to:
4. 10⁶ Stands for:
5. 10⁶ Stands for:
6. 1L =?
7. 1mL =?
8. 1ps is equal to:
9. 2.1203 cm is the length measured by meter rule, the number of significant figures in measurement are:
10. A physical balance is used to measure:
11. Amount of a substance in terms of numbers is measured in:
12. Distance of moon from the earth is:
13. Distance of the sun from the earth is:
14. For scientific notation internationally accepted practice is that there should be digitbefore the decimal point.
15. For scientific notation internationally accepted practice is that there should be how many digit(s) before the decimal point.
16. If the zero of the circular scale is above the horizontal line then the zero error is to be:
17. If the zero of the circular scale is above the horizontal line then the zero error will be:
18. If the zero of the circular scale is below the horizontal line then the zero error is to be:
19. If the zero of the circular scale is below the horizontal line then the zero error will be:
20. If zero of the vernier scale is on the left side of the zero of the main scale then it is known as ______ zero error:
21. If zero of the Vernier scale is on the left side of the zero of the main scale then zero error is to be:
22. If zero of the vernier scale is on the left side of the zero of the main scale then zero error is to be:
23. If zero of the Vernier scale is on the right side of the zero of the main scale then it is known as
24. If zero of the vernier scale is on the right side of the zero of the main scale then it is known as _____ zero error:
25. If zero of the Vernier scale is on the right side of the zero of the main scale then zero error is to be:
26. If zero of the vernier scale is on the right side of the zero of the main scale then zero error is to be:
27. In any measurement, the accurately known digits and first doubtful digit are known as:
28. In any measurement, the accurately known digits and first doubtful digit are known as:
29. In screw gauge, the distance moved forward or backward in one complete rotation of the circular scale is known as:
30. Least count of digital stop watch is:
31. Least count of digital vernier callipers is
32. Least count of mechanical stop watch is:
33. Length of the smallest division on main scale of the vernier calipers is:
34. Length of the smallest division on main scale of the Vernier Callipers is
35. Mass of 1.0 litre of water is:
36. Mass of elephant is:
37. Mass of grain of table salt is:
38. Mass of typical protein molecule is:
39. Mass of uranium atom is:
40. Meter rule can measure the length accurately up to:
41. Much of the universe is made up of:
42. Number of divisions on the Vernier Scale are:
43. Number of divisions on the vernier scale are:
44. One Femto is equal to
45. One meter is equal to:
46. Pitch of the screw gauge is:
47. S.I unit of pressure is
48. Separation between division on the Vernier Scale of the Vernier Callipers is:
49. Separation between divisions on the vernier scale of the vernier calipers is:
50. SI unit of electric charge is
51. The branch of science which deals with the study of properties of matter, energy and their mutual relationship is called:
52. The international system of units is abbreviated as:
53. The least count of digital Vernier Callipers is:
54. The least count of Screw Gauge is:
55. The least count of vernier calipers is:
56. The number of significant figures in 0.036 are:
57. The number of significant figures in 1.40 x 10⁵ are
58. The number of significant figures in 1.40 x 10^5 are:
59. The number of significant figures in 1.406 are:
60. The radius of wire is 0.022 cm. The number of significant figures in the measurements are:
61. The radius of wire is 0.022 cm. The number of significant figures in the measurements are:
62. The SI unit of intensity of light is:
63. The study of internal structure of earth and its activities like seismography is called:
64. The study of properties of the ionic state of matter is called
65. The study of the isolated nuclei of an atom is called:
66. The terms used internationally for multiples and submultiples of various units are known as:
67. The terms used internationally for multiples and submultiples of various units are known as:
68. The word science is derived from the Latin word
69. The zeroes in between the digits are considered:
70. To measure correctly the volume of the liquid, the eye must be kept on the surface of meniscus:
71. Total length of the vernier scale is:
72. Total number of divisions on the circular scale of Screw Gauge are:
73. Vernier Constant is also known as:
74. Volume measuring scale has a vertical scale in:
75. Which one is more precise?
Short Questions
1. Cut a strip of a paper sheet. Fold it along its length. Now mark centimeters and half a centimeter along its length using a ruler. Answer the following questions:
2. Define Physics?
3. Define prefixes. Interconvert the prefixes and their symbols to indicate multiples and sub-multiples for both bases and derived units?
4. Define Science?
5. Define Scientific Notation.
6. Define Standard Notation.
7. Define Unit
8. Define Vernier Constant or Define Least Count of Vernier Callipers.
9. Describe the construction and working of beam balance?
10. Describe the construction and working of electronic balance?
11. Describe the construction and working of lever balance?
12. Describe the construction and working of physical balance?
13. Describe the division of science into two main streams?
14. Describe the Lord Kelvin statement?
15. Estimate your age in seconds.
16. Explain with examples the derived units?
17. Express 1m³ = ________ L.
18. Find the base quantities involved in each of the following derived quantities: (a) Speed (b) Volume (c) Force (d) Work
19. How can we measure the volume of small irregular shape objects which floats (a piece of cork) on the water by using a measuring cylinder?
20. How can you differentiate between the base and derived quantities?
21. How is precision related to the significant figures in a measured quantity?
22. How many divisions are there on Vernier scale of Vernier Callipers?
23. Identify the base quantity is the following: Speed , Area , Force , Distance
24. Identify the following as base or derived quantity: Density, force, mass, speed, time, length, temperature and volume.
25. List the harmful effects of the scientific inventions on nature?
26. Measure the length of a pencil using you. Paper scale and with a meter ruler. Which one is more accurate and why?
27. Name any five branches of physics?
28. Name five prefixes most commonly used.
29. On what pan we place the object and why?
30. Pick out the base units in the following: Joule, Newton, kilogram, hertz, mole, ampere, meter, Kelvin, coulomb and watt.
31. The Sun is one hundred and fifty million kilometres away from the Earth. Write this as an ordinary whole number and in scientific notation.
32. What are Base quantities? Enlist them.
33. What are Base units? Write their names and symbols.
34. What are Derived quantities?
35. What are derived units?
36. What are Physical quantities?
37. What are the basic characteristics of physical quantities?
38. What are the main advantages of system international (SI units)?
39. What do you know about prefixes?
40. What do you understand by scientific notation?
41. What do you understand by the zero error of a measuring instrument?
42. What do you understand by the zero error of a measuring instrument? Why is the use of zero error necessary in a measuring instrument?
43. What is a measuring tape? What is the least count of a measuring tape?
44. What is a stopwatch? What is the least count of a mechanical stopwatch you have used in the laboratories?
45. What is a zero error? How zero error is corrected?
46. What is digital Vernier Callipers?
47. What is its least count?
48. What is meant by uncertainty or error in measurement?
49. What is meant by vernier constant?
50. What is range of Vernier Callipers used in your laboratory?
51. What is the difference between base quantities and derived quantities? Give three examples in each case.
52. What is the function of balancing screws in a physical balance?
53. What is the least count of a screw gauge?
54. What is the least count of the Vernier Calipers?
55. What is the meter rule? What is the least count of a meter rule used in the laboratories?
56. What is the range of the Vernier Calipers used in your Physics laboratory?
57. What is the range of your paper scale?
58. What role SI units have played in the development of science?
59. Which one of the two instruments is more precise and why? a) Vernier Calipers b) Screw Gauge
60. Which type of balance is more precise to measure the mass of an object?
61. Why do we need to measure extremely small interval of times?
62. Why do we prefer SI units?
63. Why do we study physics?
64. Why do we use zero correction?
65. Why is the use of zero error necessary in a measuring instrument?
66. Why no prefix is used with kilogramme?
67. Write factors effecting accuracy in a measurement.
68. Write Multiples and Submultiples of Length.
69. Write names of some safety equipment used in laboratory.
70. Write some laboratory safety Rules.
Long Questions
1. Describe the different branches of physics?
2. Describe the crucial role of physics in science, technology and society?
3. Explain with examples that science is based on physical quantities which consist of numerical magnitude and a unit.
4. List the seven units of System International (SI) along with their symbols and physical quantities?
5. Describe the construction and working of Vernier callipers?
6. Describe the construction and working of screw gauge?
7. What is a measuring cylinder? Write the method to use the measuring cylinder?
8. What is meant by the significant figures of a measurement? What are the main points to be kept in mind while determining the significant figures of a measurement?
9. Express the following quantities using prefixes. (a) 5000 g (b) 2000000 W (c) 52x10⁻¹⁰kg (d) 225×10⁻⁸s
10. How do the prefixes micro, nano and pico relate to each other?
11. Your hair grows at the rate of 1 mm per day. Find their growth rate in nms⁻¹
12. Rewrite the following In Standard form. (Scientific notation), (a) 1168 x 10⁻²⁷ (b) 32 x 10⁻⁵ (C) 725 x 10⁻⁵ kg (d) 0.02 x 10⁻⁸
13. Write the following quantities in standard form. (a) 6400 km (b) 38000 km (c) 300000000 ms⁻¹ (d) seconds in a day
14. On closing the jaws Of a Vernier Calipers, zero of the Vernier scale is on the right to its main scale such that 4th division of its Vernier scale coincides with one of the main scale division. Find its zero error and zero correction.
15. A screw gauge has 50 divisions on its circular sale. The pitch of the screw gauge is 0.5 mm. What is its least count?
16. Which of the following quantities have three figures? (a) 3.0066 m (b) 0.00309 kg (c) 5.05x 10⁻²⁷kg (d) 301.0 s
17. What are the significant figures in the following measurements? (a) 1.009 m (b) 0.00450 kg (c) 1.66 x 10⁻²⁷kg (d) 2001 s
18. A chocolate wrapper is 6.7 cm long and 5.4 cm wide. Calculate its area up to a reasonable number of significant figures.
19. Define Science.
20. Define the branches of Physics.
21. Describe the importance of Physics in our daily life.
22. Define physical quantities. Also describe its types.
23. What is international system of units? Briefly discuss.
24. Differentiate between base and derived units.
25. Define prefixes. Also give examples.
26. Define scientific notation. Also give examples.
27. Write a detail note on vernier callipers.
28. Write a note on the Screw Gauge.
29. What is Physical Balance? And how it is used?
30. Briefly explain lever balance and electronic balance?
31. Which one of the following is the most accurate?
32. Write a note on the Stop Watch.
33. What do you know about Measuring Cylinder? How volume of liquids is measured by using this cylinder?
34. Describe and explain Significant figures. What are the main points to be kept in mind
35. Write down the rules to round off the numbers?