Physics MCQs with answers Page - 11

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Q. Large astronomical telescopes always use as objective

  • (A) lens
  • (B) mirror
  • (C) combinations of lenses
  • (D) None of the above

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Q. 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

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Q. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?

I.Diffusion
II.Refraction
III.Internal reflection

  • (A) I, II and III
  • (B) I and II
  • (C) II and III
  • (D) I and III

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Q. Natural radioactivity was discovered by

  • (A) Marie Curie
  • (B) Ernest Rutherfor
  • (C) Henri Becquerel
  • (D) Enrico Fermi

A

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Q. Planets are

  • (A) luminous heavenly bodies revolving around a star
  • (B) non-luminous heavenly bodies
  • (C) luminous heavenly bodies that twinkle
  • (D) luminous heavenly bodies that do not twinkle

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Q. One nanometer is equal to

  • (A) 10^-6m
  • (B) 10^-8m
  • (C) 10^-9m
  • (D) 10^-5m

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Q. Mica is used in electrical appliances such as electric iron because mica is

  • (A) a good conductor of heat but a bad conductor of electricity
  • (B) a bad conductor of heat but a good conductor of electricity
  • (C) a good conductor of heat as well as electricity
  • (D) a bad conductor of heat as well as electricity

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Q. It is easier to roll a barrel full of coal tar than to pull it because

  • (A) the full weight of the barrel comes into play when it is pulled
  • (B) the rolling friction is much less than the sliding friction
  • (C) more surface area of the barrel is in contact with the road when it is pulled
  • (D) coal tar is a liquid and it flows in the barrel when it is rolled

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Q. Minimum number of unequal vectors which can give zero resultant are

  • (A) two
  • (B) three
  • (C) four
  • (D) more than four

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Q. Intensity of sound has

  • (A) an object existence
  • (B) a subject existence
  • (C) no existence
  • (D) both subjective and objective existence

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