UPSC Physics Units and Measurements / मात्रक और मापन Question Bank

done Measurements and Motion Total Questions - 38

• question_answer1)
  Which of the following systems of units is not based on units of mass, length and time alone?
  A)
  SI          done clear
  B)
                   MKS done clear
  C)
  CGS                 done clear
  D)
       FPS done clear
  View Solution play_arrow

• question_answer2)
        Mass is the measure of
  A)
  matter contained             done clear
  B)
  weight done clear
  C)
  force           done clear
  D)
                   none of these done clear
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• question_answer3)
        Among the following the derived quantity is
  A)
  mass                 done clear
  B)
       length done clear
  C)
  density       done clear
  D)
       time done clear
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• question_answer4)
        Which of the following is not a fundamental unit?
  A)
  newton      done clear
  B)
       kilogram done clear
  C)
  metre                done clear
  D)
       second done clear
  View Solution play_arrow

• question_answer5)
         In SI units the number of basic physical quantities are
  A)
  3                      done clear
  B)
       7 done clear
  C)
  9                      done clear
  D)
       21 done clear
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• question_answer6)
  Light year is [SSC CGL]
  A)
  light emitted by the sun in one year done clear
  B)
  time taken by light to travel from sun to earth done clear
  C)
  the distance travelled by light in free space in one year done clear
  D)
  time taken by earth to go once around the sun done clear
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• question_answer7)
        One micron equals to
  A)
  \[{{10}^{-3}}m\] done clear
  B)
       \[{{10}^{-9}}m\] done clear
  C)
  \[{{10}^{-6}}m\]       done clear
  D)
       \[{{10}^{-2}}m\] done clear
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• question_answer8)
        Practical unit of heat is
  A)
  Calorie      done clear
  B)
       Horse power done clear
  C)
  Joule                 done clear
  D)
       Watt done clear
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• question_answer9)
  Match List I (Units) with List II (Physical quantity) and select the correct answer using the codes given below the lists. [CDS]

  	List I (Units)		List II Physical quantity)
  [A]	Watt	1.	Electric charge
  [B]	Tesla	2.	Power
  [C]	Coulomb	3.	Luminous intensity
  [D]	Candela	4	Magnetic field

                                     
  A)
  A-1,   B-4,   C-1,   D-3 done clear
  B)
  A-1,   B-2,   C-3,   D-4 done clear
  C)
  A-1,   B-2,   C-4,   D-3 done clear
  D)
  A-2,   B-4,   C-3,   D-1 done clear
  View Solution play_arrow

• question_answer10)
       

  Assertion: Number of significant figures in 0.005 is one and that in 0.500 is three.

  Reason: This is because zeros are not significant.

  A)
  If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. done clear
  B)
  If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. done clear
  C)
  If Assertion is correct but Reason is incorrect. done clear
  D)
  If Assertion is incorrect but Reason is correct. done clear
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• question_answer11)
  Match List I (Physical quantity) with List II (Units) and select the correct answer using the codes given below the lists.

  List I (Physical quantity) (Units)	List II (Physical quantity)
  A. Power	1.   kg \[m{{s}^{-1}}\]
  B. Energy	2.   kg \[{{m}^{2}}{{s}^{-1}}\]
  C. Momentum	3.   \[N{{m}^{-2}}\]
  D. Pressure	4.   kW
  	5.  kWh

   
  A)
  A-4,   B-5,   C-1,   D-3 done clear
  B)
  A-4,   B-5,   C-1,   D-2 done clear
  C)
  A-5,   B-4,   C-1,   D-2 done clear
  D)
  A-5,   B-4,   C-2,   D-3 done clear
  View Solution play_arrow

• question_answer12)
        What is the correct sequence in which the lengths of the following units increase?

  1. Angstrom

  2. Micron

  3. Nanometer

  Select the correct answer using the code given below:                                   [NDA]
  A)
  1, 2, 3               done clear
  B)
       3, 1, 2 done clear
  C)
  1, 3, 2        done clear
  D)
       2, 3, 1 done clear
  View Solution play_arrow

• question_answer13)
        Which one of the following is not a dimension less quantity?
  A)
  Strain                done clear
  B)
       Relative density done clear
  C)
  Frequency done clear
  D)
       Angle done clear
  View Solution play_arrow

• question_answer14)
  Match List 'I' (Physical quantity) with list II (Dimension) and select the correct answer by using the codes given below the lists.

  List I (Physical quantity)	List II (Dimension)
  A. Density	1. [\[ML{{T}^{-2}}\]]
  B. Force	2. [\[M{{L}^{-3}}\]]
  C. Energy	3. [\[ML{{T}^{-1}}\]]
  D. Momentum	4. [\[M{{L}^{2}}{{T}^{-2}}\]]

   
  A)
  A-3,   B-2,   C-4,   D-1 done clear
  B)
  A-1,   B-2,   C-3,   D-4 done clear
  C)
  A-2,   B-1,   C-4,   D-3                                      done clear
  D)
  A-3,   B-2,   C-1,   D-4 done clear
  View Solution play_arrow

• question_answer15)
  'Farad' is the unit of [SSC CGL]
  A)
  resistance       done clear
  B)
  conductance done clear
  C)
  capacitance done clear
  D)
  inductance done clear
  View Solution play_arrow

• question_answer16)
        S.I. unit of surface tension is
  A)
  degree/cm       done clear
  B)
       N/m done clear
  C)
  \[N/{{m}^{2}}\]           done clear
  D)
       N m                           done clear
  View Solution play_arrow

• question_answer17)
  Match List I (Physical quantity) with list II (Units) and select the correct answer by using the codes given below the lists.

  	List I (Physical quantity)		List II (Units)
  A.	Solid angle	1.	Pascal
  B.	Impulse	2.	Steradian
  C.	Vicosity	3.	Newton-second
  D.	Pressure	4.	Pascal-second

   
  A)
  A-2,   B-4,   C-3,   D-1 done clear
  B)
  A-2,   B-3,   C-4,   D-1 done clear
  C)
  A-1,   B-4,   C-3,   D-2 done clear
  D)
  A-1,   B-3,   C-4,   D-2 done clear
  View Solution play_arrow

• question_answer18)
        Which one of the following pairs does not have the same dimension?                         [NDA]
  A)
  Potential energy and kinetic energy done clear
  B)
  Density and specific gravity done clear
  C)
  Focal length and height done clear
  D)
  Gravitational force and frictional force done clear
  View Solution play_arrow

• question_answer19)
  Match List I (Items) with List II (Unit of length) and select the correct answer by using the codes given below the lists.

  	List I (Items)		List II (Units of length)
  A.	Distance between earth and stars	1	Microns
  B.	Interatomic distances in a solid	2	Angstroms
  C.	Size of the nucleus	3	Light years
  D.	Wavelength of infrared laser	4	Fermi
  		5	kilometres

   
  A)
  A-5,   B-4,   C-2,   D-1 done clear
  B)
  A-3,   B-2,   C-4,   D-1 done clear
  C)
  A-5,   B-2,   C-4,   D-3 done clear
  D)
  A-3,   B-4,   C-1,   D-2 done clear
  View Solution play_arrow

• question_answer20)
                   

  Assertion: Density is a derived physical quantity.

  Reason: Density cannot be derived from the fundamental physical quantities.

  A)
  If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. done clear
  B)
  If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. done clear
  C)
  If Assertion is correct but Reason is incorrect. done clear
  D)
  If Assertion is incorrect but Reason is correct. done clear
  View Solution play_arrow

• question_answer21)
        The numerical ratio of displacement to the distance covered is always.
  A)
  less than one done clear
  B)
  equal to one done clear
  C)
  equal to or less than one done clear
  D)
  equal to or greater than one done clear
  View Solution play_arrow

• question_answer22)
  An iron ball and a wooden ball of same radius are released from a height 'h' in vacuum. Which of the two balls would take more time to reach the ground?
  A)
  Iron ball done clear
  B)
  Both would take same time done clear
  C)
  Wooden ball done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer23)
        If an object undergoes a uniform circular motion, then its                             [NDA]
  A)
  acceleration remains uniform done clear
  B)
  velocity changes done clear
  C)
  speed changes done clear
  D)
  velocity remains uniform done clear
  View Solution play_arrow

• question_answer24)
        Which one of the following remains constant while throwing a ball upward?                            [NDA]
  A)
  Displacement      done clear
  B)
  Kinetic energy done clear
  C)
  Acceleration    done clear
  D)
       Velocity done clear
  View Solution play_arrow

• question_answer25)
        A passenger in a moving train tosses a five rupee coin. If the coin falls behind him, then the train must be moving with a uniform
  A)
  acceleration        done clear
  B)
  deceleration done clear
  C)
  speed   done clear
  D)
                               velocity done clear
  View Solution play_arrow

• question_answer26)
        Which of the following distance-time graph (x-t) represents one-dimensional uniform motion?                            [IAS Prelim]
  A)
  done clear
  B)
       done clear
  C)
  done clear
  D)
       done clear
  View Solution play_arrow

• question_answer27)
        A stone is thrown vertically upwards with an initial velocity u from the top of a tower of height \[\frac{12{{u}^{2}}}{g}\]. With what velocity does the stone reach the ground?                                    [NDA]
  A)
  u                      done clear
  B)
       4u done clear
  C)
  5u            done clear
  D)
       \[2\sqrt{6}u\] done clear
  View Solution play_arrow

• question_answer28)
        Which one of the following characteristics of the particle does the shaded area of the velocity-time graph shown represent?                                    [NDA]
  A)
  Momentum    done clear
  B)
       Acceleration done clear
  C)
  Distance covered done clear
  D)
       speed done clear
  View Solution play_arrow

• question_answer29)
        A parachutist jumps from a height of 5000 metre. The relationship between his falling speed, v and the distance fallen through d is best represented as :                             [IAS Prelim]
  A)
  done clear
  B)
       done clear
  C)
  done clear
  D)
       done clear
  View Solution play_arrow

• question_answer30)
        A spherical body moves with a uniform angular velocity (\[\omega \]) around a circular path of radius r. Which one of the following statements is correct?                             [IAS Prelim]
  A)
  The body has no acceleration done clear
  B)
  The body has a radial acceleration \[{{\omega }^{2}}r\] directed toward centre of path done clear
  C)
  The body has a radial acceleration 2/52/5\[{{\omega }^{2}}r\] directed away from the centre of the path done clear
  D)
  The body has an acceleration \[{{\omega }^{2}}r\] tangential to its path done clear
  View Solution play_arrow

• question_answer31)
  If d denotes the distance covered by a car in time t and \[\vec{S}\] denotes the displacement by the car during the same time, then: [NDA]
  A)
  \[d\le \left| {\vec{S}} \right|\]                  done clear
  B)
  \[d=\left| {\vec{S}} \right|\] only done clear
  C)
  \[d\ge \left| {\vec{S}} \right|\]       done clear
  D)
  \[d\prec \left| {\vec{S}} \right|\] done clear
  View Solution play_arrow

• question_answer32)
  The displacement of a particle at time t is given by \[\vec{x}=a\hat{i}+bt\hat{j}+\frac{c}{2}{{t}^{2}}\hat{k}\] where a, b and c are positive constants. Then the particle is [NDA]
  A)
  accelerated along \[\frac{18}{5}\] direction done clear
  B)
  decelerated along \[\frac{18}{5}\] direction done clear
  C)
  decelerated along \[\hat{j}\] direction done clear
  D)
  accelerated along \[\hat{j}\] direction done clear
  View Solution play_arrow

• question_answer33)
        A body is projected vertically upwards with a velocity of 96 ft/s. What is the total time for which the body will remain in the air?
  A)
  3 s                    done clear
  B)
       6 s done clear
  C)
  9 s                    done clear
  D)
       12 s done clear
  View Solution play_arrow

• question_answer34)
        A motor vehicle is moving on a circle with a uniform speed. The net acceleration of the vehicle is                                  [NDA]
  A)
  zero done clear
  B)
  towards the centre of circle done clear
  C)
  away from the centre along the radius of the circle done clear
  D)
  perpendicular to the radius and along the velocity done clear
  View Solution play_arrow

• question_answer35)
        A swinging pendulum has its maximum acceleration at                                [NDA]
  A)
  the bottom of the swing done clear
  B)
  the two extremities of the swing done clear
  C)
  every point on the swing done clear
  D)
  no particular portion of the pendulum done clear
  View Solution play_arrow

• question_answer36)
        An object is in uniform circular motion on a plane. Suppose that you measure its displacement from the centre along one direction, say, along the x-axis. Which one among the following graphs could represent this displacement (x)?                             [NDA]
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer37)
       

  A particle starts from rest, accelerates uniformly for 3 seconds and then decelerates uniformly for 3 seconds and comes to rest.

  Which one of the following displacement (x)-time (t) graphs represents the motion of the particle?                                  [NDA]
  A)
            done clear
  B)
  done clear
  C)
  done clear
  D)
       done clear
  View Solution play_arrow

• question_answer38)
        In the system shown, the masses are released from rest. What shall be the acceleration of the moving masses?                            [NDA]
  A)
  g                       done clear
  B)
       2g/3 done clear
  C)
  g/3             done clear
  D)
       g/2 done clear
  View Solution play_arrow