# WBBSE Class 9 Physical Science MCQ Questions Chapter 1 Measurement

Well structured WBBSE Class 9 Physical Science MCQ Questions Chapter 1 Measurement can serve as a valuable review tool before exams.

## Measurement Class 9 WBBSE MCQ Questions

Multiple Choice Questions :

Question 1.
What is the SI unit of temperature ?
(i) calorie
(ii) kelvin
Kelvin.

Question 2.
Which unit should be chosen to measure the distance between two stars ?
(i) kilometre
(ii) femtometre
(iii) light year
light year.

Question 3.
Which physical quantity has the dimension [MLT-2] ?
(i) velocity
(ii) acceleration
(iii) temperature
acceleration.

Question 4.
What is the unit of atomic weight ?
(i) gram
(ii) milligram
(iii) no unit
no unit.

Question 5.
At what temperature density of water is maximum ?
(i) 0°C
(ii) 4°C
(iii) 1 K
4°C.

Question 6.
Of the following quantities, which is scaiar quantity ?
(i) velocity
(ii) time
(iii) weight
(iv) force
time.

Question 7.
The dimension of velocity is :
(i) [LT-1]
(ii) [M L T-2]
(iii) [M L-1 L-2]
(iv) [M L T-1]
[LT-1].

Question 8.
Which one is not fundamental unit ?
(i) metre
(ii) litre
(iii) kilogram
(iv) second
litre.

Question 9.
Light year is the unit of :
(i) time
(ii) distance
(iii) temperature
distance.

Question 10.
To measure the diameter of an atom, the unit is used :
(i) ohm
(ii) metre
(iii) fermi
(iv) millilitre
fermi.

Question 11.
1 fermi is :
(i) 10-15 metre
(ii) 10-10 metre
(iii) 10-5 metre.
10-15 metre.

Question 12.
1 X-unit is :
(i) 10-13 cm
(ii) 10-12 cm
(iii) 10-11 cm
10-11 cm.

Question 13.
1 light year is :
(i) 9.45 × 1010 km
(ii) 9.47 × 1011 km
(iii) 9.467 × 1012 km.
9.467 × 1012 km.

Question 14.
Which one is scalar quantity :
(i) acceleration
(ii) velocity
(iii) work
work.

Question 15.
An object has density 4 g c .c. and volume 20 c.c.. What will be the mass of the object ?
(i) 80 g
(ii) 40 g
(iii) 5 g.
80 g.

Question 16.
Identify the vector quantity :
(i) mass
(ii) volume
(iii) time
(iv) weight
Weight.

Question 17.
The unit of volume is :
(i) fundamental unit
(ii) derived unit
(iii) none of these
derived unit.

Question 18.
The density of Hg is :
(i) 13.6 g c. c.
(ii) 12.6 g c. c.
(iii) 11.6 g c. c.
13.6 g c. c.

Question 19.
The watch used in run competition is :
(i) pendulum clock
(ii) stopwatch
(iii) table clock
stopwatch.

Question 20.
The dimension of Retardation is :
(i) [LT-1]
(ii) [LT-2]
(iii) [LT]
[LT-2]

Question 21.
1 per sec is :
(i) 30.84 km
(ii) 29.75 km
(iii) 28.82 km
30.84 km

Question 22.
1 Astronomical unit (Au) is :
(i) 1.495 × 108 km
(ii) 2.57 km
(iii) 3.82 km
1.495 × 108 km .

Question 23.
The dimensions of force are :
(i) [M2 L T-2]
(ii) [M L-2 T-2]
(iii) [M L T2]
(iv) [MLT-2]
[MLT-2]

Question 24.
The prefix mega stands for
(i) 10-9
(ii) 108
(iii) 107
(iv) 106
106

Question 25.
The periodic time of a simple pendulum is propartional to
(i) its lengths
(ii) square root of its length
(iii) reciprocal of its length
(iv) square of its length
Answer: Square root of its length.

Question 26.
One litre stands for :
(i) 103 m3
(ii) 10-3 m3
(iii) 10 m3
(iv) 100 m3
10-3 m3

Fill in the blanks

1. A scalar physical quantity can be expressed with its magnitude but _________ any direction.
without.

2. _________ physical quantities are those, each of which associates one or more fundamental physical quantities.
Derived.

3. A vector physical quantity is expressed with magnitude, proper unit as well as a _________.
direction.

4. Physical quantities are of two types, _________ and vector.
scalar.

5. Any __________ quantity related to a material body or any natural or mechanical event is known as a physical quantity.
measurable.

6. The time that elapses between two consecutive apparent transits of the Sun across the __________ at a place is known as Solar day.
meridian.

7. Dimension is a _________ or quotient of the fundamental quantities involved in a derived physical quantity raised to appropriate powers.
product.

8. Some physical quantities have no units, since each is expressed by a _________ of similiar physical quantities.
ratio.

9. Derived units are obtained by using a fundamental unit more than once or by using two or more __________ units.
fundamental.

10. Measurement of a physical quantity means to compare it with a standard physical quantity of the _________ nature accepted by all in the world.
same.

11. Spring balance measures the __________ of a body.
weight.

12. __________ is the mass per unit volume.
Density.

13. Velocity is a _________ quantity.
vector.

14. Anything that can be measured is a _________ quantity.
physical.

15. CGS system is also known as ___________ system.
metric.

16. InCGS system unit of mass is __________.
gram.

17. InCGS system, unit of density is ___________.
g/c.c.

18. Mass of 1 c.c. of pure water at 4°C is ___________.
1 g.

19. A measuring cylinder is used for measuring the volume of a _____________.
liquid.

20. The weights in the weight box are in the ratio of ___________.
5 : 2 : 2 : 1

21. Work is a ___________ quantity.
scalar.

22. 1 A° = ___________ cm.
10-8

23. The dimension of force is ____________.
[MLT-2]

24. Stopwatch has no __________ hand.
hour.

25. The light year is the unit of ____________.
distance

26. Small time intervals are measured by ___________.