Physics
Measusrement
Page 8 of 28
#57 Which of the following is NOT dimensionless?
A) Refractive index
B) Coefficient of friction
C) Specific gravity
D) Electric field
Answer: D
#58 If $v=\frac{\Delta x}{\Delta t}$, the dimensions of $v$ are:
A) $M^{0}L^{1}T^{-1}$
B) $MLT^{-2}$
C) $M^{1}L^{0}T^{0}$
D) $M^{0}L^{0}T^{-1}$
Answer: A
#59 Which is the correct SI unit of density?
A) $\text{kg m}^{-3}$
B) $\text{g cm}^{-3}$
C) $\text{kg m}$
D) $\text{kg m}^{2}$
Answer: A
#60 The unit of Planck’s constant $h$ is:
A) $\text{J s}$
B) $\text{J}$
C) $\text{N s}$
D) $\text{N m s}$
Answer: A
#61 A parsec is a unit of:
A) time
B) mass
C) distance
D) luminous intensity
Answer: C
#62 Light-year is a unit of:
A) speed
B) distance
C) time
D) power
Answer: B
#63 Number of significant figures in $0.003400$ is:
A) 5
B) 4
C) 6
D) 3
Answer: B
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