16. How many fundamental units are there in SI system ?
(a) 5
(b) 7
(c) 6
(d) 4
17. Poise is the unit of :
(a) viscosity
(b) velocity
(c) force
(d) time
18. Which unit of physical quantity remains same for all unit system ?
(a) meter
(b) second
(c) ampere
(d) kilogram
19. What is the ratio of 10 micron to 1 nenometer ?
(a) 104
(b) 103
(c) 1016
(d) 1015
20. 100 picometer = ……………
(a) 10–8 cm
(b) 10–7 m
(c) 10 x 10–6 µm
(d) 10 x 10–8 µm
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