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Physics 2008 WAEC Past Questions

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41

A direct current of 5A flow through a 0.2H inductor. Calculate the energy stored in the inductor

  • A. 0.5J
  • B. 1.0J
  • C. 2.5J
  • D. 5.0J
View Answer & Discuss (3) WAEC 2008
42
Both \(\gamma\)-rays and X-rays i. can be produced by thermionic emission ii. have low frequencies iii. have short wavelengths. Which of the statements above is/are correct?
  • A. i only
  • B. ii only
  • C. iii only
  • D. i and iii only
View Answer & Discuss (2) WAEC 2008
43
When a radioactive substance undergoes a beta decay, its
  • A. mass number decreases by 1
  • B. atomic number decreases by 1
  • C. mass number increases by 1
  • D. atomic number increases by 1
View Answer & Discuss (8) WAEC 2008
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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44

Nuclear fission is preffered to nuclear fusion in the generation of energy because

  • A. very high temperature are required for fusion
  • B. the raw materials for fusion are easily obtained
  • C. energy obtained from fusion is relatively small
  • D. the by-products of fusion is very dangerous
View Answer & Discuss (7) WAEC 2008
45
Control in nuclear reactors is effected with boron rods because rhe rods have the ability to
  • A. absorb electrons
  • B. absorb neutron
  • C. accelerate electrons
  • D. slow down neutrons
View Answer & Discuss (1) WAEC 2008
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709