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Physics 2001 WAEC Past Questions

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36
Three identical lamps each power 100W are connected in parallel across a potential difference of 250V. Calculate the current in the circuit
  • A. 7.5A
  • B. 2.5A
  • C. 1.2A
  • D. 0.8A
View Answer & Discuss WAEC 2001
37

An electric bulb is rated 60W, 220V. Calculate the resistance of its filament when it is operating normally

  • A. 296.7\(\Omega\)
  • B. 400.0\(\Omega\)
  • C. 512.2\(\Omega\)
  • D. 806.7\(\Omega\)
View Answer & Discuss (5) WAEC 2001
38

The Earth's magnetic equator passes through Jos in Nigeria. At Jos. the

  • A. angle of variation is zero
  • B. magnetic declination is 90o
  • C. angle of dip is zero
  • D. horizontal component of the Earth's magnetic field is zero
View Answer & Discuss (2) WAEC 2001
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39

Which of the following statements about magnetic lines of force is not correct?

  • A. a magnnetic line of force is an imaginary line which the north pole of a magnet would describe if it is free to moves
  • B. magnetic lines of force do not cross one another
  • C. magnetic lines of force are closely packed together at neutral point
  • D. the presence of magnetic lines of force in a region indicates the presence of a magnetic field
View Answer & Discuss (4) WAEC 2001
40

The material used for constructing the core of an electromagnet is

  • A. iron
  • B. carbon
  • C. copper
  • D. steel
View Answer & Discuss (3) WAEC 2001
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