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Physics 2000 NECO Past Questions

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31
Two 2.0Ω resistors can be combined circuit to give an overall resistance of
  • A. 0.5Ω only
  • B. 1.0 Ω only
  • C. either 0,5Ω or 1.0 Ω
  • D. either 1.0Ω or 4.0 Ω
  • E. either 0.5Ω, 1.0Ω or 4.0Ω
View Answer & Discuss (2) NECO 2000
32
An astronomical telescope which is being used to view a very distant object is said to be in normal adjustment if
  • A. the final image is at the near-point
  • B. the image formed by the objective is before the focus of the eye piece
  • C. the angular magnification is the ratio of the focal length of the eye-piece lens to that of the objective
  • D. the foci dl the objective and the eye-piece coincide between the lenses
  • E. the distance between the objective lens and the eye-piece is equal to the difference between their focal lengths.
View Answer & Discuss (2) NECO 2000
33
A man standing 510m away from a wall sounds a whistle. The echo from the wall reaches him 3s later. Calculate the velocity of sound in air.
  • A. 170 ms-1
  • B. 340 ms-1
  • C. 680 ms-1
  • D. 765 ms-1
  • E. 1530 ms-1
View Answer & Discuss (4) NECO 2000
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34
The image is a plane mirror is
  • A. inverted, real with a magnificant of \(\frac{1}{2}\)
  • B. inverted, virtual with a magnification of 1
  • C. inverted, real with a magnification of 2
  • D. upright, virtual with a magnificent of 1
  • E. upright, real with a magnification of 2
View Answer & Discuss (3) NECO 2000
35

Which of the following pairs of light rays shows the widest separation in the spectrum of white light?

  • A. Red and blue
  • B. Orange and green
  • C. Red and indigo
  • D. Violet and green
  • E. Yellow and red
View Answer & Discuss (6) NECO 2000
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