Units and Dimensions – 1 – 4

16. How many fundamental units are there in SI system ?

(a) 5
(b) 7
(c) 6
(d) 4

ANSWER

EXPLANATION

17. Poise is the unit of :

(a) viscosity
(b) velocity
(c) force
(d) time

ANSWER

EXPLANATION

18. Which unit of physical quantity remains same for all unit system ?

(a) meter
(b) second
(c) ampere
(d) kilogram

ANSWER

EXPLANATION

19. What is the ratio of 10 micron to 1 nenometer ?

(a) 104
(b) 103
(c) 1016
(d) 1015

ANSWER

EXPLANATION

20. 100 picometer  =  ……………

(a) 10–8 cm
(b) 10–7 m
(c) 10 x 10–6 µm  
(d) 10 x 10–8 µm

ANSWER

EXPLANATION

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