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Physics 2011 JAMB Past Questions

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11
A machine is used to lift a load of 20 N through a height of 10 m. if the efficiency of the machine is 40%, how much work is done?
  • A. 80 J
  • B. 500 J
  • C. 300 J
  • D. 120 J
View Answer & Discuss (8) JAMB 2011
12
I. Density of the liquid.
II. Depth below the surface of the liquid.
III. Surface area of the liquid.
In which of the statement above will pressure be dependent?
  • A. I and II only.
  • B. II and III only.
  • C. I, II and III only.
  • D. I and III only.
View Answer & Discuss (10) JAMB 2011
13
Which of the following could be effectively used to reduce friction?
  • A. kerosene
  • B. grease
  • C. water
  • D. petrol
View Answer & Discuss (2) JAMB 2011
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14
Which of the following types of waves needs a medium for propagation?
  • A. sound waves
  • B. light waves
  • C. radio waves
  • D. x - rays
View Answer & Discuss (4) JAMB 2011
15
Which of the following electromagnetic waves has the highest frequency?
  • A. utra - violet rays
  • B. radio waves
  • C. x - rays
  • D. infrared - rays
View Answer & Discuss (1) JAMB 2011
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