Measurement
1. Which of the following sets can enter into the list of fundamental quantities in any system of units?
(a) length, mass and velocity (b) length, time and velocity
(c) mass, time and velocity (d) length, time and mass
2. Unit consisting of seven fundamental units, two supplementary units and large number of derived units
___________ are units.
(a) CGS (b) MKS (c) FPS (d) SI
3. Which of the following is not the unit of time ?
(a) leap year (b) microsecond
(c) lunar month (d) light year
4. The physical quantity denoted by mass× preasure
density is
(a) Force (b) Momentum
(c) Angular momentum (d) Work
5. Which of the following is not the name of a physical quantity ?
(a) kilogram (b) impulse (c) energy (d) density
6. The physical quantity having the same unit in all the systems of units is
(a) length (b) time (c) mass (d) all
7. If year is taken as the unit of time and velocity of light as the unit of velocity then unit of length is
(a) kilometre (b) metre
(c) light year (d) radius of the earth
8. The physical quantity having the unit N Kg−1 is
(a) Acceleration (b) Force (c) Velocity (d) Mass
9. Unit of energy can be written as
(a) gm cm s−2 . (b) gm cm s−1 (c) gm cm2 s−2 (d) gm cm−1 s−2
10. Which of the following is not a unit of energy?
(a) electron volt (b) kilowatt hour (c) watt sec (d) kilowatt
11. The unit of impulse is the same as that of
(a) moment of force (b) linear momentum
(c) rate of change of linear momentum (d) force
12. A pressure of 106 dyne/cm2 is equivalent to
(a) 105 N/m2 (b) 104 N/m2 (c) 106 N/m2 (d) 107 N/m2
13. A micron = X cm. Then X =
(a) 10−4 (b) 10−6 (c) 10−8 (d) 10−10
14. SI unit of luminous intensity is
(a) Lumen (b) Candela (c) Lux (d) Watt
15. Dyne-sec is the unit of
(a) momentum (b) force
(c) work (d) angular momentum
16. A unitless quantity
(a) does not exist (b) may have a non zero dimension
(c) never has non zero dimension (d) always has a non zero dimension
17. The pair of physical quantities of which one is scalar the other is vector but possess same dimensional
formulae are
(a) work and energy (b) impulse and linear momentum
(c) speed and velocity (d) force and energy
18. Select the pair of quantities which have different dimensional formulae,
(a) Stress, pressure (b) torque, work
(c) energy, torque (d) linear momentum, angular momentum
19. Out of the following, the quantity which has a unit but no dimensions is
(a) coefficient of friction (b) relative density
(c) linear strain (d) plane angle
20. Which of the following is the dimensional formula for the specific heat?
(a) [M0 L2 T2 K−1] (b) [M0 L T2 K−1]
(c) [M L2 T3 K−1] (d) [M L2 T2 K−1]
21. Unit of electric charge is
(a) faraday (b) volt (c) ohm (d) coulomb
22. N/Kg may be unit of
(a) momentum (b) velocity (c) force (d) acceleration
23. Which of the following is not a fundamental quantity?
(a) mass (b) temperature
(c) luminious intensity (d) frequency
24. ‘joule’ is SI unit of
(a) physical work (b) energy (c) both ‘a’ & ‘b’ (d) none of these
25. Power has dimensions
(a) [M1L2T2] (b) [M1 L 2 T 3 ] (c) [M1 L2 T3] (d) [M−1 L−2 T2]
26. Which of the following pair has same dimensions
(a) force and pressure (b) potential energy and work
(c) energy and power (d) work and momentum
27. Which of the following is dimensionless physical quantity
(a) temperature (b) density
(c) angle (d) electric potential
28. [M1 L1 T−1] are the dimensions of
(a) pressure (b) velocity (c) displacement (d) momentum
29. Which of following is universally accepted system of units?
(a) MKS system (b) CGS system (c) FPS system (d) SI system
30. SI system of unit is mostly preferred because
(a) it is best system
(b) it consist of seven fundamental units
(c) it fascillate link between scientific informations
(d) it is famous system
31. Ideal unit is a unit which is
(a) well defined, (b) invariable
(c) universally accepted (d) all above
32. Which of following statement is correct
(a) errors and mistakes can be avoided (b) errors can be avoided
(c) mistakes can be avoided but errors can not (d) mistakes can not be avoided
33. One micron is related to centimetre as
(a) 1 micron = 10−8 cm (b) 1 micron = 10−6 cm
(c) 1 micron = 10−5 cm (d) 1 micron = 10−4 cm
34. The dimensional formula for impulse is the same as the dimensional formula for
(a) momentum (b) force
(c) rate of change in momentum (d) acceleration0
35. Dimensions of velocity gradient are the same as that of
(a) frequency (b) time period (c) acceleration (d) momentum
36. Dimensional formula for torque is
(a) ML2T−1 ( b ) MLT−2 (c) M L T−1 (d) M L2T−2
37. According to Laplace's law in sound the dimension formula for y is
(a) M1 L2 T0 (b) M0 L1 T2 (c) M0 L0 T0 (d) M1 L1 T0
38. 1 meter is equal to (in A0.
(a) 10−5 (b) 10−6 (c) 10−8 (d) 10−10
39. 1 micron μ. is equal to
(a) 10−9 m (b) 10−12 m (c) 10−6 m (d) 10−15 m
40. 1 nanometer is equal to
(a) 10−9 mm (b) 10−6 cm (c) 10−7 cm (d) 10−9 cm
41. The dimensional formula [L2 M1 T−2] represents
(a) Pressure (b) Force (c) Energy (d) Power
42. The dimensions of impulse is
(a) [L1 M1 T−2 (b) [L1 M1 T−1] (c) [L2 M1 T−1] (d) [L2 M1 T−2]
43. Which of the following pairs of physical quantities do not have the same dimensions?
(a) Pressure and modulus of elasticity (b) Impulse & linear momentum
(c) Torque and angular momentum (d) Work & energy
44. Which of the following pairs of physical quantities have same dimensions?
(a) Force and power (b) Impulse and momentum
(c) Latent heat and specific heat (d) Work and power
45. Which of the following physical quantities is not represented by the dimensiona formula [L1 M1 T−2] ?
(a) Pressure (b) Stress (c) Young's modulus (d) Power
46. Find the order of magnitude of the day. 1 day = 86400 sec
(a) 105 (b) 104 (c) 106 (d) 107
47. Find the order of magnitude of the density of the body which is 2.9 × 10−3 kg/m
(a) 10−3 (b) 104 (c) 10+3 (d) 10− 2
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