Physics Questions and Answers

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Q61
Isotopes of an element contain
  • A the same number of protons but different number of neutrons
  • B the same number of neutrons but different number of protons
  • C equal number of protons and electrons
  • D equal number of nucleons
Answer: Option A
Q62
One watt-hour is equivalent to
  • A 6.3 x 103 J
  • B 6.3 x 10-7 J
  • C 3.6 x 103 J
  • D 3.6 x 10-3 J
Answer: Option C
Q63
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
  • A Scattering
  • B Diffraction
  • C Interference
  • D Polarization
Answer: Option A
Q64
In which of the following industries is mica as a raw material?
  • A Cement
  • B Glass and Pottery
  • C Iron and Steel
  • D Electrical
Answer: Option D
Q65
Radiocarbon dating technique is used to estimate the age of
  • A rocks
  • B monuments
  • C soil
  • D fossils
Answer: Option D
Q66
Identify the vector quantity from the following
  • A Heat
  • B Angular momentum
  • C Time
  • D Work
Answer: Option B
Q67
 Large astronomical telescopes always use as objective
  • A lens
  • B mirror
  • C combinations of lenses
  • D None of the above
Answer: Option C
Q68
One should not connect a number of electrical appliances to the same power socket because
  • A this can damage the appliances due to overloading
  • B this can damage the domestic wiring due to overloading
  • C this can damage the electrical meter
  • D the appliance will not get full voltage
Answer: Option B
Q69
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? Diffusion  Refraction     Internal reflection
  • A I, II and III
  • B I and II
  • C II and III
  • D I and III
Answer: Option C
Q70
Natural radioactivity was discovered by
  • A Marie Curie
  • B Ernest Rutherfor
  • C Henry Baquerel
  • D Enrico Fermi
Answer: Option C

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