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Physics 2018 JAMB Past Questions

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76

An object weighs 30N in air and 21N in water. The weight of the object when completely immersed in a liquid of relative density 1.4 is

  • A. 25.2N
  • B. 17.4N
  • C. 12.6N
  • D. 9.0N
View Answer & Discuss (2) JAMB 2018
77

Which of the following instruments is most suitable for measuring the outside diameter of a narrow pipe in a few millimeters in diameter?

  • A. Pair of calipers
  • B. Meter rule
  • C. Micrometer screw gauge
  • D. Tape rule
View Answer & Discuss (4) JAMB 2018
78

Electrical power is transmitted at a high voltage rather than a low voltage because the amount of energy loss is due to

  • A. Heat dissipation
  • B. Production of eddy currents
  • C. Excessive current discharge
  • D. Excessive voltage discharge
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79

If the focal length of a camera is 20cm, the distance from the film at which the lens must be set to produce a sharp image of 100cm away is

  • A. 17cm
  • B. 20cm
  • C. 25cm
  • D. 100cm
View Answer & Discuss (15) JAMB 2018
80

The image of an object is located 6cm behind a convex mirror. If it's magnification is 0.6, calculate the focal length of the mirror

  • A. 3.75cm
  • B. 6.70cm
  • C. 10.00cm
  • D. -15.00cm
View Answer & Discuss (18) JAMB 2018
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