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Physics 2007 WAEC Past Questions

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36

Which of the following statements is correct about resonance? Resonance occurs when a body

  • A. vibrates with its natural frequency
  • B. is forced to vibrate on its own natural frequency by another body at the same vibration
  • C. vibrates at the frquency of the body causing the vibration
  • D. vibrates with an irregular frequency
View Answer & Discuss (5) WAEC 2007
37
Which of the following components is used for storing electric charges?
  • A. inductor
  • B. resistor
  • C. capacitor
  • D. electrometer
View Answer & Discuss WAEC 2007
38
Which of the following operations does not represent an action of a force field?
  • A. falling of a mango fruit from the tree
  • B. picking of nails using a bar magnet
  • C. repulsion of two like charges
  • D. pushing of a wheel-barrow on a level gound
View Answer & Discuss WAEC 2007
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39
A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated
  • A. 320J
  • B. 400J
  • C. 10800J
  • D. 72000J
View Answer & Discuss (3) WAEC 2007
40
Five 80-W and three 100W are run for 8 hours. If the cost of energy is N5.00 per unit, calculate the cost of running the lamp. [1 unit = 1 kWh]
  • A. N280.00
  • B. N28.00
  • C. N7.20
  • D. N1.44
View Answer & Discuss (3) WAEC 2007
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