NEET Physics Mathematical Tools, Units & Dimensions Question Bank

done Assertion and Reasons Total Questions - 25

• question_answer1)
  Assertion: ?Light year? and ?Wavelength? both measure distance. Reason:  Both have dimensions of time.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer2)
  Assertion:         Light year and year, both measure time.          Reason:           Because light year is the time that light takes to reach the earth from the sun.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer3)
  Assertion:         Force cannot be added to pressure. Reason:           Because their dimensions are different.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer4)
  Assertion:         Linear mass density has the dimensions of [M1L?1T0]. Reason :          Because density is always mass per unit volume.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer5)
  Assertion:         Rate of flow of a liquid represents velocity of flow. Reason:           The dimensions of rate of flow are [M0L1T?1].
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer6)
  Assertion:         Units of Rydberg constant R are m?1 Reason:           It follows from Bohr?s formula \[\bar{v}=R\left( \frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}} \right)\], where the symbols have their usual                              meaning.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer7)
  Assertion:         Parallex method cannot be used for measuring distances of stars more than 100 light             years away. Reason:           Because parallex angle reduces so much that it cannot be measured accurately.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer8)
  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 true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer9)
  Assertion:         Out of three measurements l = 0.7 m; l = 0.70 m and l = 0.700 m, the last one is most accurate. Reason:           In every measurement, only the last significant digit is not accurately known.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer10)
  Assertion:         Mass, length and time are fundamental physical quantities. Reason:           They are independent of each other.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer11)
  Assertion:         Density is a derived physical quantity. Reason:           Density cannot be derived from the fundamental physical quantities.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer12)
  Assertion:         Now a days a standard metre is defined as in terms of the wavelength of light. Reason:           Light has no relation with length.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer13)
  Assertion:         Radar is used to detect an aeroplane in the sky Reason:           Radar works on the principle of reflection of waves.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer14)
  Assertion:         Surface tension and surface energy have the same dimensions. Reason:           Because both have the same S.I. unit
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer15)
  Assertion:         In\[y=A\sin (\omega \,t-kx),\]\[(\omega t-kx)\]is dimensionless. Reason:           Because dimension of \[\omega =[{{M}^{0}}{{L}^{0}}T].\]
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer16)
  Assertion:         Radian is the unit of distance. Reason:           One radian is the angle subtended at the centre of a circle by an arc equal in length to the radius of the circle.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer17)
  Assertion:         A.U. is much bigger than Å. Reason:           A.U. stands for astronomical unit and Å stands from Angstrom.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer18)
  Assertion:         When we change the unit of measurement of a quantity, its numerical value changes. Reason:           Smaller the unit of measurement smaller is its numerical value.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer19)
  Assertion:         Dimensional constants are the quantities whose value are constant. Reason:           Dimensional constants are dimensionless.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer20)
  Assertion:         The time period of a pendulum is given by the formula, \[T=2\pi \sqrt{g/l}\]. Reason:           According to the principle of homogeneity of dimensions, only that formula is correct in which the dimensions of L.H.S. is equal to dimensions of R.H.S.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer21)
  Assertion:         In the relation \[f=\frac{1}{2l}\sqrt{\frac{T}{m},}\]where symbols have standard meaning, m represent linear mass density. Reason:           The frequency has the dimensions of inverse of time.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer22)
  Assertion:         The graph between P and Q is straight line, when P/Q is constant. Reason:           The straight line graph means that P proportional to Q or P is equal to constant multiplied by Q.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer23)
  Assertion:         Avogadro number is the number of atoms in one gram mole. Reason:           Avogadro number is a dimensionless constant.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer24)
  Assertion:         L/R and CR both have same dimensions. Reason:           L/R and CR both have dimension of time.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer25)
  Assertion:         The quantity \[(1/\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}})\] is dimensionally equal to velocity and numerically equal to velocity of light. Reason:           \[{{\mu }_{0}}\] is permeability of free space and \[{{\varepsilon }_{0}}\]is the permittivity of free space.
  A)
    If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
     If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
      If assertion is true but reason is false. done clear
  D)
       If the assertion and reason both are false. done clear
  E)
         If assertion is false but reason is true. done clear
  View Solution play_arrow