JEE Questions for Physics Units And Measurements Quiz 5 - MCQExams.com

Which wave length of light is used in an optical microscope ?
  • radiowave
  • X - ray
  • infrared
  • visible
The percentage error in the distance 100 ± 5 cm is ...
  • 5 %
  • 6%
  • 8 %
  • 20 %

Physics-Units and Measurements-93211.png

  • Physics-Units and Measurements-93212.png
  • 2)
    Physics-Units and Measurements-93213.png

  • Physics-Units and Measurements-93214.png

  • Physics-Units and Measurements-93215.png
The number of significant figures in 0.000150 is ...............
  • 3
  • 5
  • 2
  • 4
Which of the following numerical value have significant figure 4 ?
  • 1.011
  • 0.010
  • 0.001
  • 0.100
What is the number of significant figures in 5.50 × 103?
  • 2
  • 7
  • 3
  • 4
The significant figures in 500.5000 are ...............
  • 5
  • 3
  • 7
  • 6
Addition of measurement 15.225 cm, 7.21 cm and 3.0 cm in significant figure is ...............
  • 25.43 cm
  • 25.4 cm
  • 25.435 cm
  • 25.4350 cm
Subtract 0.2 J from 7.36 J and express the result with correct number of significant figures.
  • 7.160 J
  • 7.016 J
  • 7.16 J
  • 7.2 J
After rounding of the number 9595 to 3 significant digits the value becomes ...............
  • 9600
  • 9000
  • 9590
  • 9500
How many significant numbers are there in (2.30 + 4.× 105?
  • 3
  • 4
  • 2
  • 5
The radius of circle is 1.26 cm. According to the concept of significant figures area of it can be represented as -
  • 4.9850 cm2
  • 4.985 cm2
  • 4.98 cm2
  • 9.98 cm2
If A = 3.331 cm B = 3.3 cm then with regard to significant figure A + B = ...............
  • 6.6 cm
  • 6.31 cm
  • 6.631 cm
  • 6 cm
In acceleration, The dimensions for mass ............... for length .. and for time
  • 0, 1, –2
  • 1, 0, –2
  • –2, 0, 1
  • –2, 1, 0
Which physical quantity is represented by M1L3T–3A–2?
  • Resistivity
  • Resistance
  • conductance
  • conductivity
If P and q are different physical quantities then which one of following is only possible dimensionally ?
  • p + q
  • p/q
  • p – q
  • p = q
Light year is a unit of
  • Time
  • Mass
  • Distance
  • Energy
Which unit is not for length ?
  • Parsec
  • Light year
  • Angstrom
  • Nano
Which of the following is not equal to watt ?
  • joule/second
  • ampere × volt
  • (ampere)2 × ohm
  • ampere /volt
Newton-second is the unit of
  • Velocity
  • Angular momentum
  • Momentum
  • Energy
Which of the following is not represented in correct unit ?

  • Physics-Units and Measurements-93216.png
  • Surface tension = N/m
  • Energy = kg-m/sec
  • Pressure = N/m2
The difference in the lengths of a mean solar day and a sidereal day is about
  • 1 min
  • 4 min
  • 15 min
  • 56 min
A suitable unit for gravitational constant is
  • kg-m sec-1
  • Nm-1 sec
  • Nm2 kg-2
  • kg m sec-1
Which of the following is not a unit of energy ?
  • W-s
  • kg-m/sec
  • N-m
  • Joule
Joule -second is the unit of
  • Work
  • Momentum
  • Pressure
  • Angular momentum
The unit of the coefficient of viscosity in SI system is
  • m/kg-s
  • m-s/kg2
  • kg/m-s2
  • kg/m-s
A cube has numerically equal volume and surface area. The volume of such a cube is
  • 216 units
  • 1000 units
  • 2000 units
  • 3000 units
Wavelength of ray of light is 0.00006 m. It is equal to
  • 6 micron
  • 60 micron
  • 600 micron
  • 0.6 micron
Temperature can be expressed as a derived quantity in terms of any of the following
  • Length and mass
  • Mass and time
  • Length, mass and time
  • None of these
Density of wood is 0.5 gm/cc in the CGS system of units. The corresponding value in MKS units is
  • 500
  • 5
  • 0.5
  • 5000
S = A (1 – e–Bxt), where S is speed and x is displacement. The unit of B is
  • m–1 s–1
  • m–2 s
  • s–2
  • s–1
Which is the correct unit for measuring nuclear radii ?
  • Micron
  • Millimetre
  • Angstrom
  • Fermi
Which of the following system of units is not based on units of mass, length and time alone?
  • SI
  • MKS
  • FPS
  • CGS
The unit for nuclear dase given to a patient is
  • Fermi
  • Rutherford
  • Curie
  • Roentgen
The unit of surface tension in SI system is
  • Dyne/cm2
  • Newton/m
  • Dyne/cm
  • Newton/m2
The unit of reduction factor of tangent galvanometer is
  • Ampere
  • Gauss
  • Radian
  • None of these
Kilowatt-hour is a unit of
  • Electrical charge
  • Energy
  • Power
  • Force
In which of the following system of units, weber is the unit of magnetic flux?
  • CGS
  • MKS
  • SI
  • None of these
Oersted is a unit of
  • Dip
  • Magnetic intensity
  • Magnetic moment
  • Pole strength
Ampere-hour is a unit of
  • Quantity of electricity
  • Strength of electric current
  • Power
  • Energy
The unit of specific resistance is
  • Ohm/cm2
  • Ohm/cm
  • Ohm-cm
  • (Ohm-cm)–1
Which does not have the same unit as others ?
  • Watt-sec
  • Kilowatt-hour
  • eV
  • Angle
Parsec is a unit of
  • Distance
  • Velocity
  • Time
  • Angle
The unit of Planck\'s constant is
  • Joule
  • Joule/s
  • Joule/m
  • Joule-s
Unit of moment of inertia in MKS system
  • kg × cm2
  • kg / cm2
  • kg × m2
  • Joule × m
Unit of stress is
  • N/m
  • N-m
  • N/m2
  • N-m2
Curie is a unit of
  • Energy of γ-rays
  • Half life
  • Radioactivity
  • Intensity of γ- rays
Hertz is the unit for
  • Frequency
  • Force
  • Electric charge
  • Magnetic flux
Candela is the unit of
  • Electric intensity
  • Luminous intensity
  • Sound intensity
  • None of these
The unit of e.m.f is
  • Joule
  • Joule-coulomb
  • Volt-coulomb
  • Joule/coulomb
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