Units and Dimensions Multiple Choice Questions and Answers for Practice

16. Nano size of gold has ..............colour.

1. orange
2. yellow
3. red
4. pink

17. Out of the following units, which is NOT a fundamental unit?

1. kg
2. newton
3. second
4. pound

18. S.I system of unit contains ..............supplementary unit.

1. 4
2. 7
3. 2
4. many

19. Significant figures depends upon the ..............of the measuring instrument.

1. accuracy
2. length
3. readings
4. number

20. State the number of significant figures in6.032 J

1. 1
2. 4
3. 3
4. 2

21. Temperature can be expressed as a derived quantity in terms of

1. none of these
2. length and mass
3. mass and time
4. length, mass and time

22. The atomic, molecular and nuclear phenomena are the parts of ..............domain.

1. electroscopic
2. macroscopic
3. microscopic
4. megascopic

23. The difference between the true value and measured value is called

1. fault
2. mistake
3. error
4. significant figures

24. The magnitude of the difference between mean value and each individual value is called

1. true error
2. absolute error
3. error in reading
4. most probable error

25. The mass of the body depends only on

1. location of the body from the observer
2. temperature.
3. pressure.
4. quantity of matter contained in the body.

26. The number of significant figures in 0.0009 is

1. 1
2. 4
3. 3
4. 2

27. The number of significant figures in 0.0500 is

1. 1
2. 4
3. 3
4. 2

28. The number of significant figures in 0.400 is

1. 4
2. 1
3. 2
4. 3

29. The physical quantity having the same unit in all the systems of unit is

1. foot
2. length
3. time
4. mass

30. The reference standard used for the measurement of a physical quantity is called

1. unit
2. standard quantity
3. dimension
4. constant