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Physics 1984 JAMB Past Questions

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11
All the heat generated in a 5\(\Omega\) resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid?
  • A. 120J
  • B. 60Jg-1
  • C. 120Jg-1
  • D. 1500J
  • E. 1500Jg-1
View Answer & Discuss JAMB 1984
12
When vibration occurs in air column, the distance between a node and an antinode is equal to
  • A. one-quarter of the wavelength
  • B. one-hall of the wavelength
  • C. the wave length
  • D. twice the wavelength
  • E. four-times the wavelength
View Answer & Discuss (3) JAMB 1984
13
Which of the following statements is (are) NOT correct? i. pressure changes do not affect the speed of sound in air ii. the velocity of sound increases with temperature iii. the quality of the note depends only on its frequency
  • A. i only
  • B. ii only
  • C. iii only
  • D. i and iii
  • E. ii and iii
View Answer & Discuss (24) JAMB 1984
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14

One of two identical tuning forks with natural frequency 256Hz, one is loaded so that 4 beats per second are heard when they are sounded together. What is the frequency of the loaded tuning fork?

  • A. 260Hz
  • B. 252Hz
  • C. 248Hz
  • D. 264Hz
  • E. 258Hz
View Answer & Discuss (8) JAMB 1984
15

Dewpoint is the temperature at which, water vapour in the atmosphere

  • A. turns into steam
  • B. solidifies into ice pellets
  • C. first condenses into liquid form
  • D. is just sufficient to cause cooling
  • E. has a relative humidity of fifty percent
View Answer & Discuss (13) JAMB 1984
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