Physics - 01

01. Which tube used to produce X-ray?

  • 1Coolidge tube
  • 2X-ray tube
  • 3Roentgen
  • 4None of these
Answer:- 1
Explanation:-

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02. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is

  • 11200 m
  • 20.33 km
  • 33.33 km
  • 433 km
Answer:- 1
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03. Intensity of sound has

  • 1an object existence
  • 2a subject existence
  • 3no existence
  • 4both subjective and objective existence
Answer:- 1
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04. Minimum number of unequal vectors which can give zero resultant are

  • 1two
  • 2three
  • 3four
  • 4more than four
Answer:- 1
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05. It is easier to roll a barrel full of coal tar than to pull it because

  • 1the full weight of the barrel comes into play when it is pulled
  • 2the rolling friction is much less than the sliding friction
  • 3more surface area of the barrel is in contact with the road when it is pulled
  • 4coal tar is a liquid and it flows in the barrel when it is rolled
Answer:- 1
Explanation:-

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

  • 1a good conductor of heat but a bad conductor of electricity
  • 2a bad conductor of heat but a good conductor of electricity
  • 3a good conductor of heat as well as electricity
  • 4a bad conductor of heat as well as electricity
Answer:- 1
Explanation:-

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07. Planets are

  • 1luminous heavenly bodies revolving around a star
  • 2non-luminous heavenly bodies
  • 3luminous heavenly bodies that twinkle
  • 4luminous heavenly bodies that do not twinkle
Answer:- 1
Explanation:-

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08. Natural radioactivity was discovered by

  • 1Marie Curie
  • 2Ernest Rutherfor
  • 3Henri Becquerel
  • 4Enrico Fermi
Answer:- 1
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09. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?

  1. I.Diffusion
  2. II.Refraction
  3. III.Internal reflection
  • 1I, II and III
  • 2I and II
  • 3II and III
  • 4I and III
Answer:- 1
Explanation:-

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10. One should not connect a number of electrical appliances to the same power socket because

  • 1this can damage the appliances due to overloading
  • 2this can damage the domestic wiring due to overloading
  • 3this can damage the electrical meter
  • 4the appliance will not get full voltage
Answer:- 1
Explanation:-

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