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Physics 2003 NECO Past Questions

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21

The inability of the eye to focus near objects is known as

  • A. astigmatism
  • B. eye ring
  • C. hypermatropia
  • D. myopia
  • E. presbyopia
View Answer & Discuss (4) NECO 2003
22
A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.
  • A. 6.0Ω
  • B. 6.42Ω
  • C. 7.6Ω
  • D. 8.4Ω
  • E. 16.0Ω
View Answer & Discuss (2) NECO 2003
23

Calculate the critical angle for light traveling from water to air. (Refractive index of water = 1.33)

  • A. 36.9°
  • B. 41.3°
  • C. 48.8°
  • D. 49.2°
  • E. 51.4°
View Answer & Discuss (2) NECO 2003
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24
A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the
  • A. charges generated by friction in the tanker are conducted to the earth
  • B. chain vibrates in resonance with the tanker’s engine
  • C. heat generated by friction in the engine is conducted to the earth
  • D. petrol tanker is balanced on the road
  • E. tanker does not exceed a certain speed limit
View Answer & Discuss NECO 2003
25
A transformer is required to give 120V from a 240V mains supply. If the primary has 5500 turns, how many turns has the secondary?
  • A. 232
  • B. 450
  • C. 550
  • D. 2750
  • E. 11000
View Answer & Discuss (2) NECO 2003
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