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Physics 2000 NECO Past Questions

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36
Which of the following is/are TRUE of nuclear fission?

I. A heavy nucleus is split into two nuclei of comparable masses
II. Two light nuclei are joined together to form a heavier nucleus
III. The total mass of the products is less than that of the reactants
  • A. I only
  • B. II only
  • C. III only
  • D. I and III only
  • E. II and III only
View Answer & Discuss NECO 2000
37

The image obtained on the screen of a pin-hole camera becomes less sharply defined when the

  • A. object is moved farther from the pin-hole
  • B. screen is moved farther from the pin-hole
  • C. object is made smaller
  • D. illumination is made more intense
  • E. pin-hole is made larger.
View Answer & Discuss (5) NECO 2000
38

Which of the following statements about evaporation and boiling is FALSE?

  • A. Evaporation may take place at any temperature.
  • B. In evaporation, vapour escapes only from the surface of a liquid
  • C. The temperature remains constant as long as the liquid is boiling
  • D. The temperature at which boiling takes place can be altered by changing the external pressure
  • E. The rate of evaporation does not depend on temperature.
View Answer & Discuss (2) NECO 2000
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39
Which of the following is/areNOT affected by a magnetic field?

I. Alpha particle
II. Cathode rays
III. Neutrons
  • A. I only
  • B. II only
  • C. III only
  • D. I and II only
  • E. I,II & III
View Answer & Discuss NECO 2000
40
The smallest unit on the sleeve of a micrometer screw gauge is 0.5mm. There are fifty divisions on the thimble of the screw gauge.
What is the smallest length that can be measured with this instrument?
  • A. 0.05cm
  • B. 0.01cm
  • C. 0.005cm
  • D. 0.001cm
  • E. 0.0001cm
View Answer & Discuss (5) NECO 2000
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