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Which of the following is the most preci...

Which of the following is the most precise instrument for measuring length?

A

Vernier calipers

B

Screw guage

C

Optical instrument

D

All the above

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The correct Answer is:
C
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AAKASH SERIES-UNITS AND MEASUREMENTS-EXERCISE -1 A
  1. Which of the following is a dimensional constant ?

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  2. Which of the following will have the dimensions of time ?

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  3. Which of the following is the most precise instrument for measuring le...

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  4. Which of the following sets cannot enter into the list of fundamental...

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  5. The dimensional formula for magnetic flux is

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  6. A pair of physical quantities having same dimensional formula is

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  7. The value of Planck's constant in SI unit is

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  8. SI unit of permittivity of free space is

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  9. The dimensions of universal gravitational constant are

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  10. The ratio of the dimensions of Planck's constant and that of the momen...

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  11. The velocity v of a particle at time t is given by v=at+(b)/(t+c), whe...

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  12. Dimensions of resistance in an electrical circuit, in terms of dimensi...

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  13. If the error in the measurement of radius of a sphere is 2%, then the ...

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  14. Which two of the following five physical paramenters have the same dim...

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  15. If the dimensions of a physical quantity are given by ["M"^(a)"L"^(b)"...

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  16. The dimensions of (1)/(2)epsilon(0)E^(2), where epsilon(0) is permitti...

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  17. A student measures the distance traversed in free fall of a body, init...

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  18. The density of material in CGS system of mass is 4g cm^(3) in a system...

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  19. The damping force on an oscillator is directly proportional to the vel...

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  20. If force (F), velocity (v)and time (T) are taken as fundamental units,...

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