Entry Test MCQ :: Measurements
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11. |
In any measurement the significant figures are |
A. |
all accurately known and all doubtful digits |
B. |
only accurately known digits |
C. |
only doubtful digits |
D. |
all accurately known digits and the first doubuful digit |
Answer: Option D
Explanation:
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12. |
A digit zero in a measurement |
A. |
may be significant may not significant |
B. |
always significant |
C. |
always insignificantsig |
D. |
significant only if left to a significant figure |
Answer: Option A
Explanation:
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13. |
Number of significant figures in 0.0173 are |
Answer: Option A
Explanation:
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14. |
Smaller the least count of the instrument more is the measurement |
A. |
accurate |
B. |
precise |
C. |
accurate and precise |
D. |
none of these |
Answer: Option B
Explanation:
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15. |
The dimension of force is |
Answer: Option B
Explanation:
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16. |
ML-1 T-2 is the dimension of |
A. |
force |
B. |
pressure |
C. |
momentum |
D. |
energy |
Answer: Option B
Explanation:
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17. |
Dimensional analysis is helpful for |
A. |
deriving a possible formula |
B. |
checking the homogeneity of a physical equation |
C. |
verification of laws |
D. |
only a and b are correct |
Answer: Option D
Explanation:
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18. |
Which equation is not dimensionally correct? |
A. |
E=mc2 |
B. |
Vf=Vi+at |
C. |
S=Vt2 |
D. |
S=1/2at2 |
Answer: Option C
Explanation:
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19. |
SI unit of coefficient of viscosity is |
A. |
Kg.m.S-1 |
B. |
Kg m-1.S-1 |
C. |
Kg.m.S |
D. |
Kg-1.m-1.S-1 |
Answer: Option B
Explanation:
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20. |
Three students measured length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is correct record? |
A. |
only (i) |
B. |
only (ii) |
C. |
only (iii) |
D. |
both (i) and (ii) |
Answer: Option C
Explanation:
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