Units and Dimensions Multiple Choice Questions and Answers for Practice

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

25. The mass of the body depends only on

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

26. The number of significant figures in 0.0009 is

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

27. The number of significant figures in 0.0500 is

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

28. The number of significant figures in 0.400 is

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

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

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

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

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