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41. In an optical fibre the signal is transmitted
  A.  in a straight line path
  B.  due to total internal reflection
  C.  in a curved path
  D.  due to refraction
     
   
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42. At low temperature, Lead behaves as a
  A.  Semi conductor
  B.  Insulator
  C.  Super conductor
  D.  Conductor
     
   
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43. The term 'Higgs Boson' is associated with
  A.  Nano Technology
  B.  Oncology
  C.  Stem Cell Research
  D.  God Particle
     
   
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44. 0°K is equivalent to
  A.  −273°C
  B.  273°C
  C.  0°C
  D.  100°C
     
   
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45. Heat is transmitted form higher temperature to lower temperature through the actual motion of the molecules in
  A.  Conduction
  B.  Radiation
  C.  Convection
  D.  Both conduction and convection
     
   
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46. The"Choke" used with a tubelight is basically
  A.  a capacitor
  B.  an inductor
  C.  a transformer
  D.  a resistor
     
   
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47. The washing machine works on the principle of:
  A.  Dialysis
  B.  Diffusion
  C.  Reverse osmosis
  D.  Centrifugation
     
   
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48. The boiling point of water depends upon the
  A.  Density
  B.  Volume
  C.  Atmospheric pressure
  D.  Mass
     
   
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49. Which of the followoing was the first theory of super conductivity?
  A.  London theory
  B.  Ginzburg Landau theroy
  C.  Resonating valence bond theory
  D.  Quantum field theory
     
   
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50. Whcih of the following is an example of simple harmonic motion?
  A.  Earth spinning on its axis
  B.  Simple pendulum motion
  C.  Ball bouncing on floor
  D.  Motion of a ceiling fan
     
   
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