Random Questions Part-6

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1)   Solar cells work on the principle of

  • [A] photo-voltaic effect
  • [B] photoelectric effect
  • [C] photo-conductive effect
  • [D] photosynthesis

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photo-voltaic effect

2)   Direct conversion of solar energy with the use of a photo voltaic cell results in the production of

  • [A] Optical energy
  • [B] Electrical energy
  • [C] Thermal energy
  • [D] Mechanical energy

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Electrical energy

3)   The energy that can harness heat stored below the earth surface is known as:

  • [A] thermal energy
  • [B] nuclear energy
  • [C] tidal energy
  • [D] geo-thermal energy

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geo-thermal energy

4)   A device which is used to limit the current in an electrical circuit is called a

  • [A] Grid
  • [B] Fuse
  • [C] Hub
  • [D] Conductor

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Fuse

5)   A device which is used to limit the current in an electrical circuit is called a

  • [A] Grid
  • [B] Fuse
  • [C] Hub
  • [D] Conductor

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Fuse

6)   The slope of a velocity-time graph represents

  • [A] acceleration
  • [B] displacement
  • [C] distance
  • [D] speed

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acceleration

7)   Light beam which is highly directional is called:

  • [A] eraser
  • [B] grazer
  • [C] maser
  • [D] laser

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laser

8)   The radiation initially produced in fluorescent tube is

  • [A] infrared
  • [B] ultraviolet
  • [C] microwaves
  • [D] X-rays

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ultraviolet

9)   The sharpness of a television image is termed as its

  • [A] Clarity
  • [B] Colour
  • [C] Resolution
  • [D] Graphics

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Resolution

10)   Small bubbles are perfectly spherical because of

  • [A] Gravity
  • [B] Pressure
  • [C] Viscosity
  • [D] Surface tension

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Surface tension

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