Quiz  /  Rotational Inertia Gate & PSU MCQ Questions With Answers

  • 1. 
    Torque can be positive or negative.

  • True
  • False

  • 2. 
    The easiest way to open a heavy door is by applying the force

  • Near the hinges
  • In the middle of the door
  • At the edge of the door far from the hinges
  • At the top of the door

  • 3. 
    Conditions for equilibrium are:1st condition: net force = 02nd condition:net torque = 0

  • True
  • False

  • 4. 
    The different types of energies associated with a molecule are __________

  • Vibrational energy
  • electronic energy
  • Rotational energy
  • All of these

  • 5. 
    The energy in joules of a photon of wavelength 355 nm is

  • 5.596 x 1019 J
  • 5.596 x 1028 J

  • 6. 
    A body with a definite shape that doesn't change is:

  • period
  • angular acceleration
  • rigid body
  • radius of gyration

  • 7. 
    The formula used to find a torque is...

  • (m)(g)
  • (F) cos(Ɵ)
  • (F)(r)( sin θ\thetaθ  )
  • (m)(a)

  • 8. 
    __________ (ω)– the rate at which a body rotates about an axis (radians per second)

  • linear speed
  • rotational speed
  • angular speed
  • velocity

  • 9. 
    The microwave active molecules are

  • HCl, OCS
  • CO,CO2
  • Both a) and b)
  • None of the above

  • 10. 
    A photon of wave number 100 cm-1 has a wavelength of

  • 1 m
  • 1 mm
  • 1000 nm
  • 100 m

  • 11. 
    Molecules which are having _______ are microwave active.

  • Dipole moment
  • High pressure Detector
  • Principle axis
  • Acidity

  • 12. 
    Which of the following molecule has no rotational spectrum?

  • NH3
  • HCl
  • N2
  • H2O.

  • 13. 
    The value of torque depends on the rotation axis and the _______________________

  • magnitude of applied force.
  • mass of object
  • moment inertia of object
  • shape of object

  • 14. 
    From the rotational microwave spectrum of 1H35Cl, we find that B = 10.59342 cm-1 . Given that the masses of 1H and 35 Cl are 1.0078250 and 34.9688527 amu, respectively, determine the bond length of the 1H35Cl molecule

  • 1.274 x 10-10 m
  • 1.674 x 10-10 m
  • 1.474 x 10-10 m
  • 1.0274 x 10-10 m

  • 15. 
    Calculate the moment of inertia, I, of the molecule 1H35Cl. The masses of the two atoms are mH = 1.673 x 1027 kg and mCl = 5.807 x 1026 kg. The equilibrium bond length of the molecule is 1.275 Å.

  • 2.644 x 1047 kg m2
  • 2.644 x 1027 kg m2
  • 2.644 x 1044 kg m2
  • 2.644 x 1024 kg m2

  • 16. 
    The product of the force times the lever arm; the movement of the force about the axis is:

  • torque
  • lever arm
  • rotational inertia
  • angular momentum
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