BHU PET 2018 ACHARYA JOYTISH FALIT Question Paper with Answer Key PDF

BHU PET Questions

• 1.

  At \( 4^\circ C \) for water, \( C_P = C_V \) because:
  

  • \( \left( \frac{\partial P}{\partial V} \right)_T = 0 \)
    
  • \( \left( \frac{\partial V}{\partial T} \right)_P = 0 \)
    
  • \( \left( \frac{\partial P}{\partial T} \right)_V = 0 \)
    
  • None of the three
    
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• 2.

  The radius of the first zone in a zone plate of focal length 40 cm for light of wavelength 4000 Å is:
  

  • 0.4 cm
    
  • 0.04 cm
    
  • 0.16 cm
    
  • 0.010 cm
    
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• 3.

  If a black body radiation enclosure expands, so that its volume becomes 64 times, the temperature of the enclosure becomes:
  

  • One fourth
    
  • Four times
    
  • 16 times
    
  • 8 times
    
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• 4.

  In a survey of 700 students in a college, 180 were listed as drinking Limca, 275 as drinking Miranda, and 95 were listed as drinking both. How many students were drinking neither Limca nor Miranda?
  

  • 360
    
  • 350
    
  • 340
    
  • 320
    
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• 5.

  During a quasi-static process:
  

  • The system is not in thermodynamic equilibrium
    
  • The system is at all times infinitesimally near a state of thermodynamic equilibrium
    
  • The system is far away from a state of thermodynamic equilibrium
    
  • None of the three
    
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• 6.

  Specific heat of saturated steam is:

  • Positive
    
  • Negative
    
  • Zero
    
  • 1 cal/gm-degree
    
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