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Physics 2002 NECO Past Questions

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21

If the size of the hole of a pinhole camera is increased, the image formed becomes

  • A. brighter and blurred
  • B. brighter and larger
  • C. brighter and sharper
  • D. blurred and duller
  • E. blurred and larger
View Answer & Discuss (11) NECO 2002
22
A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms-1]
  • A. 1320m
  • B. 660m
  • C. 400m
  • D. 330m
  • E. 165m
View Answer & Discuss (2) NECO 2002
23

A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed. Which statement is correct?

  • A. The cap will be positively charged and the leaf will be negatively charged
  • B. The cap will be negatively charged and the leaf will be positively changed
  • C. The cap and the leaf will be positively charged
  • D. The cap and the leaf will be negatively charged
  • E. none
View Answer & Discuss (9) NECO 2002
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24
If the refractive index of water is 1.33, what is the critical angle for a water-air boundary?
  • A. 36.0 °
  • B. 40.2 °
  • C. 41.8 °
  • D. 48.8 °
  • E. 62.7 °
View Answer & Discuss (5) NECO 2002
25
What does NOT affect the rate of evaporation of a liquid
  • A. exposed surface area of the liquid
  • B. humidity of the surroundings
  • C. nature of the liquid
  • D. temperature the liquid
  • E. volume of the liquid.
View Answer & Discuss NECO 2002
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