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 :
What is the SI unit of temperature ?
Which unit should be chosen to measure the distance between two stars ?
(iii) light year
Which physical quantity has the dimension [MLT-2] ?
What is the unit of atomic weight ?
(iii) no unit
At what temperature density of water is maximum ?
(iii) 1 K
Of the following quantities, which is scaiar quantity ?
The dimension of velocity is :
(ii) [M L T-2]
(iii) [M L-1 L-2]
(iv) [M L T-1]
Which one is not fundamental unit ?
Light year is the unit of :
To measure the diameter of an atom, the unit is used :
1 fermi is :
(i) 10-15 metre
(ii) 10-10 metre
(iii) 10-5 metre.
1 X-unit is :
(i) 10-13 cm
(ii) 10-12 cm
(iii) 10-11 cm
1 light year is :
(i) 9.45 × 1010 km
(ii) 9.47 × 1011 km
(iii) 9.467 × 1012 km.
9.467 × 1012 km.
Which one is scalar quantity :
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.
Identify the vector quantity :
The unit of volume is :
(i) fundamental unit
(ii) derived unit
(iii) none of these
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.
The watch used in run competition is :
(i) pendulum clock
(iii) table clock
The dimension of Retardation is :
1 per sec is :
(i) 30.84 km
(ii) 29.75 km
(iii) 28.82 km
1 Astronomical unit (Au) is :
(i) 1.495 × 108 km
(ii) 2.57 km
(iii) 3.82 km
1.495 × 108 km .
The dimensions of force are :
(i) [M2 L T-2]
(ii) [M L-2 T-2]
(iii) [M L T2]
The prefix mega stands for
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.
One litre stands for :
(i) 103 m3
(ii) 10-3 m3
(iii) 10 m3
(iv) 100 m3
Fill in the blanks
1. A scalar physical quantity can be expressed with its magnitude but _________ any direction.
2. _________ physical quantities are those, each of which associates one or more fundamental physical quantities.
3. A vector physical quantity is expressed with magnitude, proper unit as well as a _________.
4. Physical quantities are of two types, _________ and vector.
5. Any __________ quantity related to a material body or any natural or mechanical event is known as a physical quantity.
6. The time that elapses between two consecutive apparent transits of the Sun across the __________ at a place is known as Solar day.
7. Dimension is a _________ or quotient of the fundamental quantities involved in a derived physical quantity raised to appropriate powers.
8. Some physical quantities have no units, since each is expressed by a _________ of similiar physical quantities.
9. Derived units are obtained by using a fundamental unit more than once or by using two or more __________ units.
10. Measurement of a physical quantity means to compare it with a standard physical quantity of the _________ nature accepted by all in the world.
11. Spring balance measures the __________ of a body.
12. __________ is the mass per unit volume.
13. Velocity is a _________ quantity.
14. Anything that can be measured is a _________ quantity.
15. CGS system is also known as ___________ system.
16. InCGS system unit of mass is __________.
17. InCGS system, unit of density is ___________.
18. Mass of 1 c.c. of pure water at 4°C is ___________.
19. A measuring cylinder is used for measuring the volume of a _____________.
20. The weights in the weight box are in the ratio of ___________.
5 : 2 : 2 : 1
21. Work is a ___________ quantity.
22. 1 A° = ___________ cm.
23. The dimension of force is ____________.
24. Stopwatch has no __________ hand.
25. The light year is the unit of ____________.
26. Small time intervals are measured by ___________.