GK-Physics Question and Answer

GK-Physics Question and Answer
61. Isotopes of an element contain
  • the same number of protons but different number of neutrons
  • the same number of neutrons but different number of protons
  • equal number of protons and electrons
  • equal number of nucleons
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62. One watt-hour is equivalent to
  • 6.3 x 103 J
  • 6.3 x 10-7 J
  • 3.6 x 103 J
  • 3.6 x 10-3 J
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63. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
  • Scattering
  • Diffraction
  • Interference
  • Polarization
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64. In which of the following industries is mica as a raw material?
  • Cement
  • Glass and Pottery
  • Iron and Steel
  • Electrical
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65. Radiocarbon dating technique is used to estimate the age of
  • rocks
  • monuments
  • soil
  • fossils
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66. Identify the vector quantity from the following
  • Heat
  • Angular momentum
  • Time
  • Work
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67.  Large astronomical telescopes always use as objective
  • lens
  • mirror
  • combinations of lenses
  • None of the above
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68. One should not connect a number of electrical appliances to the same power socket because
  • this can damage the appliances due to overloading
  • this can damage the domestic wiring due to overloading
  • this can damage the electrical meter
  • the appliance will not get full voltage
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69. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
Diffusion
 Refraction
    Internal reflection
  • I, II and III
  • I and II
  • II and III
  • I and III
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70. Natural radioactivity was discovered by
  • Marie Curie
  • Ernest Rutherfor
  • Henry Baquerel
  • Enrico Fermi
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