JEE Main & Advanced Physics Mathematical Tools, Units & Dimensions Question Bank

done Units Total Questions - 109

• question_answer1)
  Light year is a unit of [MP PMT 1989; CPMT 1991; AFMC 1991, 2005]
  A)
  Time done clear
  B)
  Mass done clear
  C)
  Distance done clear
  D)
  Energy done clear
  View Solution play_arrow

• question_answer2)
  The magnitude of any physical quantity
  A)
  Depends on the method of measurement done clear
  B)
  Does not depend on the method of measurement done clear
  C)
  Is more in SI system than in CGS system done clear
  D)
  Directly proportional to the fundamental units of mass, length and time done clear
  View Solution play_arrow

• question_answer3)
  Which of the following is not equal to watt [SCRA 1991; CPMT 1990]
  A)
  Joule/second done clear
  B)
  Ampere \[\times \] volt done clear
  C)
  (Ampere)2 \[\times \]ohm done clear
  D)
  Ampere/volt done clear
  View Solution play_arrow

• question_answer4)
  Newton's second is the unit of [CPMT 1984, 85; MP PMT 1984]
  A)
  Velocity done clear
  B)
  Angular momentum done clear
  C)
    Momentum done clear
  D)
    Energy done clear
  View Solution play_arrow

• question_answer5)
  Which of the following is not represented in correct unit [NCERT 1984; MNR 1995]
  A)
  \[\frac{\text{Stress}}{\text{Strain}}=N/{{m}^{2}}\].... done clear
  B)
  Surface tension =\[N/m\] done clear
  C)
  Energy \[=kg\text{-}m/\sec \] done clear
  D)
  Pressure \[=N/{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer6)
  One second is equal to [MNR 1986]
  A)
  1650763.73 time periods of \[Kr\] clock done clear
  B)
  652189.63 time periods of \[Kr\] clock done clear
  C)
  1650763.73 time periods of \[Cs\] clock done clear
  D)
  9192631770 time periods of \[Cs\] clock done clear
  View Solution play_arrow

• question_answer7)
  One nanometre is equal to [SCRA 1986; MNR 1986]
  A)
  \[{{10}^{9}}mm\]. done clear
  B)
  \[{{10}^{-6}}\,cm\] done clear
  C)
  \[{{10}^{-7}}cm\] done clear
  D)
  \[{{10}^{-9}}cm\] done clear
  View Solution play_arrow

• question_answer8)
  A micron is related to centimetre as
  A)
  \[1\,micron={{10}^{-8}}cm\] done clear
  B)
  \[1\,micron={{10}^{-6}}cm\] done clear
  C)
  \[1\,micron={{10}^{-5}}cm\] done clear
  D)
  \[1\,micron={{10}^{-4}}\,cm\] done clear
  View Solution play_arrow

• question_answer9)
  The unit of power is [CPMT 1985]
  A)
  Joule done clear
  B)
  Joule per second only done clear
  C)
  Joule per second and watt both done clear
  D)
  Only watt done clear
  View Solution play_arrow

• question_answer10)
  A suitable unit for gravitational constant is [MNR 1988]
  A)
  \[kg\text{-}\,m{{\sec }^{-1}}\] done clear
  B)
  \[N\ {{m}^{-1}}\sec \] done clear
  C)
  \[N\,\,{{m}^{2}}\,k{{g}^{-2}}\] done clear
  D)
  \[kg\,m\,{{\sec }^{-1}}\] done clear
  View Solution play_arrow

• question_answer11)
  SI unit of pressure is [EAMCET 1980; DPMT 1984; CBSE PMT 1988; NCERT 1976; AFMC 1991; USSR MEE 1991]
  A)
  Pascal done clear
  B)
  \[Dynes/c{{m}^{2}}\] done clear
  C)
  \[cm\,\] of \[Hg\] done clear
  D)
  Atmosphere done clear
  View Solution play_arrow

• question_answer12)
  The unit of angular acceleration in the SI system is [SCRA 1980; EAMCET 1981]
  A)
  \[N\,k{{g}^{-1}}\] done clear
  B)
  \[m\,{{s}^{-2}}\] done clear
  C)
  \[rad\,{{s}^{-2}}\] done clear
  D)
  \[m\,k{{g}^{-1}}K\] done clear
  View Solution play_arrow

• question_answer13)
  The unit of Stefan's constant \[\sigma \] is [AFMC 1986; MP PET 1992; MP PMT 1992; CBSE PMT 2002]
  A)
  \[W\,{{m}^{-2}}\,{{K}^{-1}}\]. done clear
  B)
  \[W\,{{m}^{2}}\,{{K}^{-4}}\] done clear
  C)
  \[W\,{{m}^{-2}}\,{{K}^{-4}}\] done clear
  D)
  \[W\,{{m}^{-2}}\,{{K}^{4}}\] done clear
  View Solution play_arrow

• question_answer14)
  Which of the following is not a unit of energy [AIIMS 1985]
  A)
  \[W\text{-s}\]. done clear
  B)
  \[kg\text{-}m/\sec \] done clear
  C)
  \[N\text{-}m\] done clear
  D)
  Joule done clear
  View Solution play_arrow

• question_answer15)
  In \[S=a+bt+c{{t}^{2}}\]. \[S\] is measured in metres and \[t\] in seconds. The unit of \[c\] is [MP PMT 1993]
  A)
  None done clear
  B)
  \[m\] done clear
  C)
  \[m{{s}^{-1}}\] done clear
  D)
  \[m{{s}^{-2}}\] done clear
  View Solution play_arrow

• question_answer16)
  Joule-second is the unit of [CPMT 1990; CBSE PMT 1993; BVP 2003]
  A)
  Work done clear
  B)
  Momentum done clear
  C)
  Pressure done clear
  D)
  Angular momentum done clear
  View Solution play_arrow

• question_answer17)
  Unit of energy in SI system is [CPMT 1971; NCERT 1976]
  A)
  Erg done clear
  B)
  Calorie done clear
  C)
  Joule done clear
  D)
  Electron volt done clear
  View Solution play_arrow

• question_answer18)
  A cube has numerically equal volume and surface area. The volume of such a cube is [CPMT 1971, 74]
  A)
  216 units done clear
  B)
  1000 units done clear
  C)
  2000 units done clear
  D)
  3000 units done clear
  View Solution play_arrow

• question_answer19)
  Wavelength of ray of light is \[0.00006\,m\]. It is equal to [CPMT 1977]
  A)
  \[6\,\,microns\] done clear
  B)
  \[60\,\,microns\] done clear
  C)
  \[600\,\,microns\] done clear
  D)
  \[0.6\,\,microns\] done clear
  View Solution play_arrow

• question_answer20)
  Electron volt is a unit of [MP PMT 1993]
  A)
  Charge done clear
  B)
  Potential difference done clear
  C)
  Momentum done clear
  D)
  Energy done clear
  View Solution play_arrow

• question_answer21)
  Temperature can be expressed as a derived quantity in terms of any of the following [MP PET 1993; UPSEAT 2001]
  A)
  Length and mass done clear
  B)
  Mass and time done clear
  C)
  Length, mass and time done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer22)
  Unit of power is [NCERT 1972; CPMT 1971; DCE 1999]
  A)
  Kilowatt done clear
  B)
  Kilowatt-hour done clear
  C)
  Dyne done clear
  D)
  Joule done clear
  View Solution play_arrow

• question_answer23)
  Density of wood is \[0.5gm/cc\] in the CGS system of units. The corresponding value in MKS units is [CPMT 1983; NCERT 1973; JIPMER 1993]
  A)
  500 done clear
  B)
  5 done clear
  C)
  0.5 done clear
  D)
  5000 done clear
  View Solution play_arrow

• question_answer24)
  Unit of energy is [NCERT 1974; CPMT 1975]
  A)
  \[J/\sec \] done clear
  B)
  \[Watt-day\] done clear
  C)
  \[Kilowatt\] done clear
  D)
  \[gm\text{-}cm/{{\sec }^{2}}\] done clear
  View Solution play_arrow

• question_answer25)
  Which is the correct unit for measuring nuclear radii
  A)
  Micron done clear
  B)
  Millimetre done clear
  C)
  Angstrom done clear
  D)
  Fermi done clear
  View Solution play_arrow

• question_answer26)
  One Mach number is equal to
  A)
  Velocity of light done clear
  B)
  Velocity of sound \[(332\,\,m/\sec )\] done clear
  C)
  \[1\,\,km/\sec \] done clear
  D)
  \[1\,m/\sec \] done clear
  View Solution play_arrow

• question_answer27)
  The unit for nuclear dose given to a patient is
  A)
  Fermi done clear
  B)
  Rutherford done clear
  C)
  Curie done clear
  D)
  Roentgen done clear
  View Solution play_arrow

• question_answer28)
  Volt/metre is the unit of [AFMC 1991; CPMT 1984]
  A)
  Potential done clear
  B)
  Work done clear
  C)
  Force done clear
  D)
  Electric intensity done clear
  View Solution play_arrow

• question_answer29)
  \[Newton/metr{{e}^{\text{2}}}\] is the unit of [CPMT 1985; ISM Dhanbad 1994; AFMC 1995]
  A)
  Energy done clear
  B)
  Momentum done clear
  C)
  Force done clear
  D)
  Pressure done clear
  View Solution play_arrow

• question_answer30)
  The unit of surface tension in SI system is [MP PMT 1984; AFMC 1986; CPMT 1985, 87; CBSE PMT 1993; KCET 1999; DCE 2000, 01]
  A)
  \[Dyne/c{{m}^{2}}\] done clear
  B)
  \[I=\frac{Q}{t}=\frac{[Q]}{[T]}=[{{M}^{0}}{{L}^{0}}{{T}^{-1}}Q]\] done clear
  C)
  \[Dyne/cm\] done clear
  D)
  \[Newton/{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer31)
  The unit of reduction factor of tangent galvanometer is [CPMT 1987; AFMC 2004]
  A)
  Ampere done clear
  B)
  Gauss done clear
  C)
  Radian done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer32)
  The unit of self inductance of a coil is [MP PMT 1983, 92; SCRA 1986; CBSE PMT 1993; CPMT 1984, 85, 87]
  A)
  Farad done clear
  B)
  Henry done clear
  C)
  Weber done clear
  D)
  Tesla done clear
  View Solution play_arrow

• question_answer33)
  Henry/ohm can be expressed in [CPMT 1987]
  A)
  Second done clear
  B)
  Coulomb done clear
  C)
  Mho done clear
  D)
  Metre done clear
  View Solution play_arrow

• question_answer34)
  The SI unit of momentum is [SCRA 1986, 89; CPMT 1987]
  A)
  \[\frac{kg}{m}\] done clear
  B)
  \[\frac{kg.m}{\sec }\] done clear
  C)
  \[\frac{kg.{{m}^{2}}}{\sec }\] done clear
  D)
  \[kg\times Newton\] done clear
  View Solution play_arrow

• question_answer35)
  The velocity of a particle depends upon as \[v=a+bt+c{{t}^{2}}\]; if the velocity is in \[m/\sec \], the unit of \[a\] will be [CPMT 1990]
  A)
  \[m/\sec \] done clear
  B)
  \[m/{{\sec }^{2}}\] done clear
  C)
  \[{{m}^{2}}/\sec \] done clear
  D)
  \[m/{{\sec }^{3}}\] done clear
  View Solution play_arrow

• question_answer36)
  One million electron volt \[(1\,MeV)\] is equal to [JIPMER 1993, 97]
  A)
  \[{{10}^{5}}eV\] done clear
  B)
  \[{{10}^{6}}eV\] done clear
  C)
  \[{{10}^{4}}eV\] done clear
  D)
  \[{{10}^{7}}eV\] done clear
  View Solution play_arrow

• question_answer37)
  \[Erg-{{m}^{-1}}\] can be the unit of measure for [DCE 1993]
  A)
  Force done clear
  B)
  Momentum done clear
  C)
  Power done clear
  D)
  Acceleration done clear
  View Solution play_arrow

• question_answer38)
  The unit of potential energy is [AFMC 1991]
  A)
  \[g(cm/{{\sec }^{2}})\] done clear
  B)
  \[g{{(cm/\sec )}^{2}}\] done clear
  C)
  \[g(c{{m}^{2}}/\sec )\] done clear
  D)
  \[g(cm/\sec )\] done clear
  View Solution play_arrow

• question_answer39)
  Which of the following represents a volt [CPMT 1990; AFMC 1991]
  A)
  Joule/second done clear
  B)
  Watt/Ampere done clear
  C)
  Watt/Coulomb done clear
  D)
  Coulomb/Joule done clear
  View Solution play_arrow

• question_answer40)
  \[Kilowatt-hour\] is a unit of [NCERT 1975; AFMC 1991]
  A)
  Electrical charge done clear
  B)
  Energy done clear
  C)
  Power done clear
  D)
  Force done clear
  View Solution play_arrow

• question_answer41)
  What is the SI unit of permeability [CBSE PMT 1993]
  A)
  Henry per metre done clear
  B)
  Tesla metre per ampere done clear
  C)
  Weber per ampere metre done clear
  D)
  All the above units are correct done clear
  View Solution play_arrow

• question_answer42)
  In which of the following systems of unit, \[Weber\] is the unit of magnetic flux [SCRA 1991; CBSE PMT 1993; DPMT 2005]
  A)
  CGS done clear
  B)
  MKS done clear
  C)
  SI done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer43)
  Tesla is a unit for measuring [CBSE PMT 1993]
  A)
  Magnetic moment done clear
  B)
  Magnetic induction done clear
  C)
  Magnetic intensity done clear
  D)
  Magnetic pole strength done clear
  View Solution play_arrow

• question_answer44)
  If the unit of length and force be increased four times, then the unit of energy is [Kerala PMT 2005]
  A)
  Increased 4 times done clear
  B)
  Increased 8 times done clear
  C)
  Increased 16 times done clear
  D)
  Decreased 16 times done clear
  View Solution play_arrow

• question_answer45)
  Oersted is a unit of [SCRA 1989]
  A)
  Dip done clear
  B)
  Magnetic intensity done clear
  C)
  Magnetic moment done clear
  D)
  Pole strength done clear
  View Solution play_arrow

• question_answer46)
  \[Ampere-hour\] is a unit of [SCRA 1980, 89; ISM Dhanbad 1994]
  A)
  Quantity of electricity done clear
  B)
  Strength of electric current done clear
  C)
  Power done clear
  D)
  Energy done clear
  View Solution play_arrow

• question_answer47)
  The unit of specific resistance is [SCRA 1989; MP PET 1984; CPMT 1975]
  A)
  \[Ohm/c{{m}^{2}}\] done clear
  B)
  \[Ohm/cm\] done clear
  C)
  \[Ohm-cm\] done clear
  D)
  \[{{(Ohm-cm)}^{-1}}\] done clear
  View Solution play_arrow

• question_answer48)
  The binding energy of a nucleon in a nucleus is of the order of a few [SCRA 1979]
  A)
  \[eV\] done clear
  B)
  \[Ergs\] done clear
  C)
  \[MeV\] done clear
  D)
  \[Volts\] done clear
  View Solution play_arrow

• question_answer49)
  \[Par\sec \] is a unit of [SCRA 1986; BVP 2003; AIIMS 2005]
  A)
  Distance done clear
  B)
  Velocity done clear
  C)
  Time done clear
  D)
  Angle done clear
  View Solution play_arrow

• question_answer50)
  If \[{{u}_{1}}\] and \[{{u}_{2}}\] are the units selected in two systems of measurement and \[{{n}_{1}}\] and \[{{n}_{2}}\] their numerical values, then [SCRA 1986]
  A)
  \[{{n}_{1}}{{u}_{1}}={{n}_{2}}{{u}_{2}}\] done clear
  B)
  \[{{n}_{1}}{{u}_{1}}+{{n}_{2}}{{u}_{2}}=0\] done clear
  C)
  \[{{n}_{1}}{{n}_{2}}={{u}_{1}}{{u}_{2}}\] done clear
  D)
  \[({{n}_{1}}+{{u}_{1}})=({{n}_{2}}+{{u}_{2}})\] done clear
  View Solution play_arrow

• question_answer51)
  \[1\,eV\] is [SCRA 1986]
  A)
  Same as one joule done clear
  B)
  \[1.6\times {{10}^{-19}}J\] done clear
  C)
  \[1V\] done clear
  D)
  \[1.6\times {{10}^{-19}}C\] done clear
  View Solution play_arrow

• question_answer52)
  \[1kWh=\] [AFMC 1986; SCRA 1986, 91]
  A)
  \[1000W\] done clear
  B)
  \[36\times {{10}^{5}}J\] done clear
  C)
  \[1000J\] done clear
  D)
  \[3600\,J\] done clear
  View Solution play_arrow

• question_answer53)
  Universal time is based on [SCRA 1989]
  A)
  Rotation of the earth on its axis done clear
  B)
  Earth's orbital motion around the earth done clear
  C)
  Vibrations of cesium atom done clear
  D)
  Oscillations of quartz crystal done clear
  View Solution play_arrow

• question_answer54)
  The nuclear cross-section is measured in barn, it is equal to
  A)
  \[{{10}^{-20}}\,{{m}^{2}}\] done clear
  B)
  \[{{10}^{-30}}\,{{m}^{2}}\] done clear
  C)
  \[{{10}^{-28}}\,{{m}^{2}}\] done clear
  D)
  \[{{10}^{-14}}\,{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer55)
  Unit of moment of inertia in MKS system [MP PMT 1984]
  A)
  \[kg\times c{{m}^{2}}\] done clear
  B)
  \[kg/c{{m}^{2}}\] done clear
  C)
  \[kg\times {{m}^{2}}\] done clear
  D)
  \[Joule\times m\] done clear
  View Solution play_arrow

• question_answer56)
  Unit of stress is [MP PMT 1984]
  A)
  \[N/m\] done clear
  B)
  \[N-m\] done clear
  C)
  \[N/{{m}^{2}}\] done clear
  D)
  \[N-{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer57)
  Unit of Stefan's constant is [MP PMT 1989]
  A)
  \[J\,{{s}^{-1}}\] done clear
  B)
  \[J\,{{m}^{-2}}{{s}^{-1}}{{K}^{-4}}\] done clear
  C)
  \[J\,{{m}^{-2}}\] done clear
  D)
  \[J\,s\] done clear
  View Solution play_arrow

• question_answer58)
  Unit of magnetic moment is [MP PET 1989]
  A)
  \[Ampere-metr{{e}^{2}}\] done clear
  B)
  \[Ampere-metre\] done clear
  C)
  \[Weber-metr{{e}^{2}}\] done clear
  D)
  \[Weber/metre\] done clear
  View Solution play_arrow

• question_answer59)
  Curie is a unit of [CBSE PMT 1992; CPMT 1992]
  A)
  Energy of g-rays done clear
  B)
  Half life done clear
  C)
  Radioactivity done clear
  D)
  Intensity of g-rays done clear
  View Solution play_arrow

• question_answer60)
  Hertz is the unit for [MNR 1983; SCRA 1983; RPMT 1999]
  A)
  Frequency done clear
  B)
  Force done clear
  C)
  Electric charge done clear
  D)
  Magnetic flux done clear
  View Solution play_arrow

• question_answer61)
  One pico Farad is equal to
  A)
  \[{{10}^{-24}}F\] done clear
  B)
  \[{{10}^{-18}}F\] done clear
  C)
  \[{{10}^{-12}}F\] done clear
  D)
  \[{{10}^{-6}}F\] done clear
  View Solution play_arrow

• question_answer62)
  In SI, Henry is the unit of [MP PET 1984; CBSE PMT 1993; DPMT 1984]
  A)
  Self inductance done clear
  B)
  Mutual inductance done clear
  C)
  and both done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer63)
  The unit of \[e.m.f.\]is [CPMT 1986; AFMC 1986]
  A)
  Joule done clear
  B)
  Joule-Coulomb done clear
  C)
  Volt?Coulomb done clear
  D)
  Joule/Coulomb done clear
  View Solution play_arrow

• question_answer64)
  Which of the following is not the unit of time [CPMT 1991; NCERT 1990; DPMT 1987; AFMC 1996]
  A)
  Micro second done clear
  B)
  Leap year done clear
  C)
  Lunar months done clear
  D)
  Parallactic second done clear
  E)
  (e) Solar day done clear
  View Solution play_arrow

• question_answer65)
  Unit of self inductance is [MP PET 1982]
  A)
  \[\frac{Newton-second}{Coulomb\times Ampere}\] done clear
  B)
  \[\frac{Joule/Coulomb\times Second}{Ampere}\] done clear
  C)
  \[\frac{Volt\times metre}{Coulomb}\] done clear
  D)
  \[\frac{Newton\times metre}{Ampere}\] done clear
  View Solution play_arrow

• question_answer66)
  To determine the Young's modulus of a wire, the formula is \[Y=\frac{F}{A}:\frac{L}{\Delta L};\] where \[L\] = length, \[A=\]area of cross-section of the wire, \[\Delta L=\]change in length of the wire when stretched with a force \[F\]. The conversion factor to change it from CGS to MKS system is [MP PET 1983]
  A)
  1 done clear
  B)
  10 done clear
  C)
  0.1 done clear
  D)
  0.01 done clear
  View Solution play_arrow

• question_answer67)
  Young's modulus of a material has the same units as [MP PMT 1994]
  A)
  Pressure done clear
  B)
  Strain done clear
  C)
  Compressibility done clear
  D)
  Force done clear
  View Solution play_arrow

• question_answer68)
  One yard in SI units is equal [MP PMT 1995]
  A)
  1.9144 \[metre\] done clear
  B)
  0.9144 \[metre\] done clear
  C)
  0.09144 \[kilometre\] done clear
  D)
  1.0936 \[kilometre\] done clear
  View Solution play_arrow

• question_answer69)
  Which of the following is smallest unit [AFMC 1996]
  A)
  Millimetre done clear
  B)
  Angstrom done clear
  C)
  Fermi done clear
  D)
  Metre done clear
  View Solution play_arrow

• question_answer70)
  Which one of the following pairs of quantities and their units is a proper match
  A)
  Electric field ?\[Coulomb/m\] done clear
  B)
  Magnetic flux ? \[Weber\] done clear
  C)
  Power ? Farad done clear
  D)
  Capacitance ? Henry done clear
  View Solution play_arrow

• question_answer71)
  The units of modulus of rigidity are [MP PMT 1997]
  A)
  \[N-m\] done clear
  B)
  \[N/m\] done clear
  C)
  \[N-{{m}^{2}}\] done clear
  D)
  \[N/{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer72)
  The unit of absolute permittivity is [CMEET Bihar 1995]
  A)
  \[Fm\] (Farad-meter) done clear
  B)
  \[F{{m}^{-1}}\] (Farad/meter) done clear
  C)
  \[F{{m}^{-2}}\](Farad/\[metr{{e}^{2}}\]) done clear
  D)
  \[F\] (Farad) done clear
  E)
  (e) None of these done clear
  View Solution play_arrow

• question_answer73)
  Match List-I with List-II and select the correct answer using the codes given below the lists [SCRA 1994] List-I List-II I. Joule A. Henry \[\times \] Amp/sec II. Watt B. Farad \[\times \] Volt III. Volt C. Coulomb \[\times \] Volt IV. Coulomb D. Oersted \[\times \] cm E. Amp \[\times \] Gauss F. \[Am{{p}^{2}}\] \[\times \] Ohm
  A)
  Codes: \[I-A,\,II-F,\,III-E,\,IV-D\] done clear
  B)
  \[I-C,\,II-F,\,III-A,\,IV-B\] done clear
  C)
  \[I-C,\,II-F,\,III-A,\,IV-E\] done clear
  D)
  \[I-B,\,II-F,\,III-A,\,IV-C\] done clear
  View Solution play_arrow

• question_answer74)
  Which relation is wrong [RPMT 1997]
  A)
  1 Calorie = 4.18 Joules done clear
  B)
  \[1\overset{\text{o}}{\mathop{\text{A}}}\,={{10}^{-10}}m\] done clear
  C)
  \[1\,\,MeV=1.6\times {{10}^{-13}}Joules\] done clear
  D)
  \[1\,Newton={{10}^{-5}}Dynes\] done clear
  View Solution play_arrow

• question_answer75)
  If \[x=at+b{{t}^{2}}\], where \[x\] is the distance travelled by the body in kilometres while \[t\] is the time in seconds, then the units of b are [CBSE PMT 1993]
  A)
  \[km/s\] done clear
  B)
  \[km-s\] done clear
  C)
  \[km/{{s}^{2}}\] done clear
  D)
  \[km-{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer76)
  The equation \[\left( P+\frac{a}{{{v}^{2}}} \right)\] \[(v-b)\] constant. The units of \[a\] are [MNR 1995; AFMC 1995]
  A)
  \[Dyne\times c{{m}^{5}}\] done clear
  B)
  \[Dyne\times c{{m}^{4}}\] done clear
  C)
  \[Dyne/c{{m}^{3}}\] done clear
  D)
  \[Dyne/c{{m}^{2}}\] done clear
  View Solution play_arrow

• question_answer77)
  Which of the following quantity is expressed as force per unit area [AFMC 1995]
  A)
  Work done clear
  B)
  Pressure done clear
  C)
  Volume done clear
  D)
  Area done clear
  View Solution play_arrow

• question_answer78)
  Match List-I with List-II and select the correct answer by using the codes given below the lists [NDA 1995] List-I List-II Distance between earth and stars 1. Microns Inter-atomic distance in a solid 2. Angstroms Size of the nucleus 3. Light years Wavelength of infrared laser 4. Fermi 5. Kilometres
  A)
  Codes a b c d 5 4 2 1 done clear
  B)
  3 2 4 1 done clear
  C)
  5 2 4 3 done clear
  D)
  3 4 1 2 done clear
  View Solution play_arrow

• question_answer79)
  Unit of impulse is [CPMT 1997]
  A)
  Newton done clear
  B)
  done clear
  C)
  done clear
  D)
  Joule done clear
  View Solution play_arrow

• question_answer80)
  Which is not a unit of electric field [UPSEAT 1999]
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer81)
  The correct value of on the Kelvin scale is [UPSEAT 2000]
  A)
  \[273.15K\] done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer82)
  'Torr' is the unit of [RPMT 1999, 2000]
  A)
  Pressure done clear
  B)
  Volume done clear
  C)
  Density done clear
  D)
  Flux done clear
  View Solution play_arrow

• question_answer83)
  Which of the following is a derived unit [BHU 2000]
  A)
  Unit of mass done clear
  B)
  Unit of length done clear
  C)
  Unit of time done clear
  D)
  Unit of volume done clear
  View Solution play_arrow

• question_answer84)
  Dyne/cm2 is not a unit of [RPET 2000]
  A)
  Pressure done clear
  B)
  Stress done clear
  C)
  Strain done clear
  D)
  Young's modulus done clear
  View Solution play_arrow

• question_answer85)
  The units of angular momentum are [MP PMT 2000]
  A)
  \[kg-{{m}^{2}}/{{s}^{2}}\] done clear
  B)
  \[Joule-s\] done clear
  C)
  \[Joule/s\] done clear
  D)
  \[kg-m-{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer86)
  Which of the following is not the unit of energy [MP PET 2000]
  A)
  Calorie done clear
  B)
  Joule done clear
  C)
  Electron volt done clear
  D)
  Watt done clear
  View Solution play_arrow

• question_answer87)
  Which of the following is not a unit of time [UPSEAT 2001]
  A)
  Leap year done clear
  B)
  Micro second done clear
  C)
  Lunar month done clear
  D)
  Light year done clear
  View Solution play_arrow

• question_answer88)
  The S.I. unit of gravitational potential is [AFMC 2001]
  A)
  \[J\] done clear
  B)
  \[J\text{-}k{{g}^{-1}}\] done clear
  C)
  \[J\text{-}kg\] done clear
  D)
  \[J\text{-}k{{g}^{-2}}\] done clear
  View Solution play_arrow

• question_answer89)
  Which one of the following is not a unit of young's modulus [KCET 2005]
  A)
  \[N{{m}^{-1}}\] done clear
  B)
  \[N{{m}^{-2}}\] done clear
  C)
  \[Dyne\ c{{m}^{-2}}\] done clear
  D)
  Mega Pascal done clear
  View Solution play_arrow

• question_answer90)
  In C.G.S. system the magnitutde of the force is 100 dynes. In another system where the fundamental physical quantities are kilogram, metre and minute, the magnitude of the force is [EAMCET 2001]
  A)
  0.036 done clear
  B)
  0.36 done clear
  C)
  3.6 done clear
  D)
  36 done clear
  View Solution play_arrow

• question_answer91)
  The unit of \[L/R\] is (where \[L\] = inductance and \[R\] = resistance) [Orissa JEE 2002]
  A)
  \[\sec \] done clear
  B)
  \[{{\sec }^{-1}}\] done clear
  C)
  Volt done clear
  D)
  Ampere done clear
  View Solution play_arrow

• question_answer92)
  Which is different from others by units [Orissa JEE 2002]
  A)
  (a) Phase difference done clear
  B)
  Mechanical equivalent done clear
  C)
  Loudness of sound done clear
  D)
  Poisson's ratio done clear
  View Solution play_arrow

• question_answer93)
  Length cannot be measured by [AIIMS 2002]
  A)
  Fermi done clear
  B)
  Debye done clear
  C)
  Micron done clear
  D)
  Light year done clear
  View Solution play_arrow

• question_answer94)
  The value of Planck's constant is [CBSE PMT 2002]
  A)
  \[6.63\times {{10}^{-34}}J\text{-}\sec \] done clear
  B)
  \[6.63\times {{10}^{34}}J/\sec \] done clear
  C)
  \[6.63\times {{10}^{-34}}kg\text{-}{{m}^{2}}\] done clear
  D)
  \[6.63\times {{10}^{34}}kg/\sec \] done clear
  View Solution play_arrow

• question_answer95)
  A physical quantity is measured and its value is found to be \[nu\] where \[n=\] numerical value and \[u=\] unit. Then which of the following relations is true [RPET 2003]
  A)
  \[n\propto {{u}^{2}}\] done clear
  B)
  \[n\propto u\] done clear
  C)
  \[n\propto \sqrt{u}\] done clear
  D)
  \[n\propto \frac{1}{u}\] done clear
  View Solution play_arrow

• question_answer96)
  Faraday is the unit of [AFMC 2003]
  A)
  Charge done clear
  B)
  emf done clear
  C)
  Mass done clear
  D)
  Energy done clear
  View Solution play_arrow

• question_answer97)
  Candela is the unit of [UPSEAT 1999; CPMT 2003]
  A)
  Electric intensity done clear
  B)
  Luminous intensity done clear
  C)
  Sound intensity done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer98)
  The unit of reactance is [MP PET 2003]
  A)
  (a) Ohm done clear
  B)
  Volt done clear
  C)
  Mho done clear
  D)
  Newton done clear
  View Solution play_arrow

• question_answer99)
  The unit of Planck's constant is [RPMT 1999; MP PET 2003; Pb. PMT 2004]
  A)
  Joule done clear
  B)
  Joule/s done clear
  C)
  Joule/m done clear
  D)
  Joule-s done clear
  View Solution play_arrow

• question_answer100)
  Number of base SI units is [MP PET 2003]
  A)
  4 done clear
  B)
  7 done clear
  C)
  3 done clear
  D)
  5 done clear
  View Solution play_arrow

• question_answer101)
  SI unit of permittivity is [KCET 2004]
  A)
  \[{{C}^{2}}{{m}^{2}}{{N}^{-1}}\] done clear
  B)
  \[{{C}^{-1}}{{m}^{2}}{{N}^{-2}}\] done clear
  C)
  \[{{C}^{2}}{{m}^{2}}{{N}^{2}}\] done clear
  D)
  \[{{C}^{2}}{{m}^{-2}}{{N}^{-1}}\] done clear
  View Solution play_arrow

• question_answer102)
  Which does not has the same unit as others [Orissa PMT 2004]
  A)
  Watt-sec done clear
  B)
  Kilowatt-hour done clear
  C)
  eV done clear
  D)
  J-sec done clear
  View Solution play_arrow

• question_answer103)
  Unit of surface tension is [Orissa PMT 2004]
  A)
  \[N{{m}^{-1}}\] done clear
  B)
  \[N{{m}^{-2}}\] done clear
  C)
  \[{{N}^{2}}{{m}^{-1}}\] done clear
  D)
  \[N{{m}^{-3}}\] done clear
  View Solution play_arrow

• question_answer104)
  Which of the following system of units is not based on units of mass, length and time alone [Kerala PMT 2004]
  A)
  SI done clear
  B)
  MKS done clear
  C)
  FPS done clear
  D)
  CGS done clear
  View Solution play_arrow

• question_answer105)
  The unit of the coefficient of viscosity in S.I. system is [J & K CET 2004]
  A)
  \[m/kg\text{-}s\] done clear
  B)
  \[m\text{-}s/k{{g}^{2}}\] done clear
  C)
  \[kg/m\text{-}{{s}^{2}}\] done clear
  D)
  \[kg/m\text{-}s\] done clear
  View Solution play_arrow

• question_answer106)
  The unit of Young?s modulus is [Pb. PET 2001]
  A)
  \[N{{m}^{2}}\] done clear
  B)
  \[N{{m}^{-2}}\] done clear
  C)
  Nm done clear
  D)
  \[N{{m}^{-1}}\] done clear
  View Solution play_arrow

• question_answer107)
  One femtometer is equivalent to [DCE 2004]
  A)
  \[{{10}^{15}}\,m\] done clear
  B)
  \[{{10}^{-15}}\,m\] done clear
  C)
  \[{{10}^{-12}}\,m\] done clear
  D)
  \[{{10}^{12}}\,m\] done clear
  View Solution play_arrow

• question_answer108)
  How many wavelength of \[K{{r}^{86}}\] are there in one metre [MNR 1985; UPSEAT 2000; Pb. PET 2004]
  A)
  1553164.13 done clear
  B)
  1650763.73 done clear
  C)
  652189.63 done clear
  D)
  2348123.73 done clear
  View Solution play_arrow

• question_answer109)
  Which of the following pairs is wrong [AFMC 2003]
  A)
  Pressure-Baromter done clear
  B)
  Relative density-Pyrometer done clear
  C)
  Temperature-Thermometer done clear
  D)
  Earthquake-Seismograph done clear
  View Solution play_arrow