Physical Quantities and Measurement - Physics For Class IX (Science Group) - Multiple Choice Questions, Fill In The Blanks And Concept Map

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Physics For Class IX (Science Group)
UNIT 1: Physical Quantities and Measurement

Section (A) Multiple Choice Questions

1. The Figure 1.26 shows part of a Vernier scale, what is the reading on the Vernier scale:
a) 6.50 cm
b) 6.55 cm ✓
c) 7.00 cm
d) 7.45 cm

2. Ten identical steel balls each of mass 27 g, are immersed in a measuring cylinder having 20 cm³ of water. The reading of water level rises to 50 cm³. What is the density of the steel?
a) 0.90 gm / cm³ ✓
b) 8.1 gm / cm³
c) 9.0 gm / cm³
d) 13.5 gm / cm³

3. An object of mass 100 g is immersed in water as shown in the figure 1.27, what is the density of the material from which object is made?
a) 0.4 g / cm³
b) 0.9 g / cm³
c) 1.1 g / cm³
d) 2.5 g / cm³ ✓

4. What is the reading of this micrometer in figure 1.28:
a) 5.43 mm
b) 6.63 mm ✓
c) 7.30 mm
d) 8.13 mm

5. A chips wrapper is 4.5 cm long and 5.9 cm wide. Its area upto significant figures will be:
a) 30 cm²
b) 28 cm²
c) 26.55 cm² ✓
d) 32 cm²

6. A worldwide system of measurements in which the units of base quantities were introduced is called:
a) prefixes
b) international system of units ✓
c) hexadecimal system
d) none of above

7. All accurately known digits and first doubtful digit in an expression are known as:
a) non-significant figures
b) significant figures ✓
c) estimated figures
d) crossed figures

8. If zero line of Vernier scale coincides with zero of main scale, then zero error is:
a) positive
b) zero ✓
c) negative
d) one

9. zero error of the instrument is:
a) systematic error ✓
b) human error
c) random error
d) classified error

10. Length, mass, electric current, time, intensity of light and amount of substance are examples of:
a) base quantities ✓
b) derived quantities
c) prefixes
d) quartile quantities

11. Physics is the branch of science which observes the nature represents it mathematically and conclude with the:
(a) observation
(b) calculation
(c) experiment ✓
(d) all of them

12. Physicists are categorized into:
(a) two categories
(b) three categories ✓
(c) four categories
(d) five categories

13. The branch of physics that mainly concerned with the laws of motion and gravitation is called:
(a) mechanics ✓
(b) thermodynamics
(c) astrophysics
(d) geophysics

14. This branch of physics deals with heat and temperature and their relation to energy and work:
(a) mechanics
(b) thermodynamics ✓
(c) astrophysics
(d) geophysics

15. It is the study of properties of charges in rest and motion:
(a) Mechanics
(b) Atomic physics
(c) Magnetism
(d) Electricity ✓

16. It deals with the constituents, structure, behavior and interaction of atomic nuclei:
(a) Atomic physics
(b) Particle physics
(c) Nuclear physics ✓
(d) Plasma physics

17. It studies the elementary constituents of matter and radiation, and the interaction between them:
(a) Atomic physics
(b) Particle physics ✓
(c) Nuclear physics
(d) Plasma physics

18. The study of celestial objects with the help of laws of physics is known as:
(a) geophysics
(b) particle physics
(c) nuclear physics
(d) astrophysics ✓

19. The study of state of matter and its properties is known as:
(a) mechanics
(b) plasma physics ✓
(c) thermodynamics
(d) atomic physics

20. The study of internal structure of earth is known as:
(a) mechanics
(b) plasma physics
(c) geophysics ✓
(d) atomic physics

21. Physical quantities which cannot be explained by other physical quantities are called:
(a) fundamental physical quantities ✓
(b) derived physical quantities
(c) prefix physical quantities
(d) quartile physical quantities

22. Physical quantities which are explained on the basis of fundamental physical quantities are called:
(a) base or fundamental physical quantities
(b) derived physical quantities ✓
(c) prefix physical quantities
(d) quartile physical quantities

23. Volume, velocity, force, density, and acceleration are examples of:
(a) derived quantities ✓
(b) base quantities
(c) prefixes
(d) quartile quantities

24. Use of every instrument is restricted by smallest measurement that it can perform which is called:
(a) zero count
(b) smallest count
(c) least count ✓
(d) minimum count

25. 1000 m = ____ :
(a) 10 km
(b) 10 cm
(c) 1 cm
(d) 1 km✓

26. 10 mm = ____ :
(a) 1 km
(b) 1 cm ✓
(c) 1 m
(d) 1 ft

27. The minimum distance between two points lying on same plane is called:
(a) length ✓
(b) displacement
(c) vector
(d) scalar

28. On meter rule each cm is divided further in to 10 divisions which are called:
(a) kilometer
(b) meter
(c) millimeters ✓
(d) centimeter

29. The smallest reading a meter rule can measure up to:
(a) 1 inch
(b) 1 mm ✓
(c) 1 cm
(d) 1 m

30. Zero mark on vernier scale is slightly to the right than the zero error is called:
(a) zero error
(b) neutral zero error
(c) positive zero error ✓
(d) negative zero error

31. From the reading, the positive zero error is:
(a) added
(b) subtracted ✓
(c) multiplied
(d) divides

32. 1000 mg = ____ :
(a) 1 g ✓
(b) 1 kg
(c) 1 lb
(d) 1 mg

33. Numbers in Scientific Notation are made up of:
(a) two parts
(b) three parts ✓
(c) four parts
(d) five parts

34. 0.000 000 000 000 000 000 000 000 000 000 911 kg = ____:
(a) 9.11 x 10^-30 kg
(b) 0.911 x 10^-30
(c) 0.911 x 10^-31
(d) 9.11 x 10^-31 ✓

35. 1 m³ = ____:
(a) 10 liter
(b) 100 liter
(c) 1000 liter ✓
(d) 10000 liter

36. Volume of rectangular block = ___ :
(a) length + width + height
(b) length x width x height ✓
(c) length + width x height
(d) length x width + height

37. Volume of a cylinder = _____ :
(a) π x radius² x height ✓
(b) π x radius x height
(c) π x radius² x height²
(d) π x radius x height²

38. The term density of a substance is defined as:
(a) mass x volume
(b) mass + volume
(c) mass / volume ✓
(d) volume / mass

39. The S.l unit for density is:
(a) kg.m³
(b) kg³.m
(c) m³/kg
(d) kg/m³ ✓

40. The density of Aluminium is 2.70 gm/cm³ which is equal to:
(a) 20.7 kg/m³
(b) 27 kg/m³
(b) 270 kg/m³
(d) 2700 kg/m³ ✓

41. (Density of a substance / Density of water) is called:
(a) relative density
(b) specific gravity
(c) Both 'a' & 'b' ✓
(d) None of them

42. The numbers of reliably known digits in a value are known as:
(a) significant figures ✓
(b) least count
(c) zero error
(d) reliable numbers

43. 0.00000034 has:
(a) 2 significant figures ✓
(b) 6 significant figures
(c) 8 significant figures
(d) 9 significant figures

44. 200 has:
(a) 1 significant figure ✓
(b) 2 significant figures
(c) 3 significant figures
(d) no significant figures

45. 5.00 has:
(a) 1 significant figure
(b) 2 significant figures
(c) 3 significant figures ✓
(d) no significant figures

46. In the number 0.00509 how many significant numbers are there?
(a) 2 significant figures
(b) 3 significant figures ✓
(c) 5 significant figures
(d) 6 significant figures

47. 'Mole' is a unit of:
(a) electric current
(b) temperature
(c) luminous intensity
(d) amount of substance ✓

48. The unit of luminous intensity is:
(a) Kelvin
(b) candela ✓
(c) mole
(d) Ampere

49. 100 cm = ____ :
(a) 1 km
(b) 1 cm
(c) 1 m ✓
(d) 1 ft

49. 1000 mm = ____ :
(a) 1 km
(b) 1 cm
(c) 1 m ✓
(d) 1 ft

Fill In The Blanks

1. A science which explores the nature is Physics.
2. One of the most basic and ancient science is the Physics.
3. A unit prefix is a specifier, which indicates multiples or fractions of the units.
4. 1 liter = 1000 cm³
5. 1 m³ = 1000 litr
6. A Black lady mathematician named Katherine solved the problem of putting the first orbital satellite.
7. In movie “Hidden Figures” we can observe the importance of Reliable Numbers.
8. Physics is the branch of science which deals with studies of matter its composition, properties, and interaction with energy.
9. There are two types of physicist, theoretical and experimental physicist.
10. Physics define mathematical relation between physical quantities.
11. A physical quantity has magnitude and unit.
12. Physical quantity are mainly classified into two categorize (i) Base or fundamental quantities and (ii) Derived physical quantities.
13. The standard of length is meter can be measured by measuring tape, or meter rule.
14. The standard of mass is kilogram can be measured by physical balance.
15. The standard of time is second can be measured by stop watch.
16. The measured or calculated values either macroscopic or microscopic can be expressed in Scientific Notations.
17. The volume of liquid is calculated or measured with help of measuring cylinder.
18. The volume of irregular objects can be calculated through measuring cylinder with displacement of water.
19. The density of a pure substance is the ratio of mass per unit volume.
20. The density of objects can be calculated with the help of water as a reference known as specific gravity also known as relative density.
21. Prefixes can be used to represent large or smaller values of a physical quantity.
22. The most accurate or reliable numbers of a value are known as significant figures.
23. Measurement is explained with the help of describing the mathematical relations between various physical quantities.

CONCEPT MAP (Physics Quantities)