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Physics 1980 JAMB Past Questions

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16

Which of the following statements on the use of X-rays is incorrect? X-rays are used

  • A. in hospitals to obtain photogaphs of tissues and bones in the body
  • B. for the treatment of malignant growths like cancer cells
  • C. in detecting fingerprints
  • D. to reveal hidden flaws in metal castings and welded joints
  • E. to detect alternations which have been made to works of art
View Answer & Discuss (15) JAMB 1980
17
What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?
  • A. o
  • B. \(\frac{1}{2}\)
  • C. 2
  • D. 8
  • E. 32
View Answer & Discuss (7) JAMB 1980
18
If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is
  • A. 10cm
  • B. 15cm
  • C. 16cm
  • D. 19cm
  • E. 20cm
View Answer & Discuss JAMB 1980
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19
A quantity of sungas at -133 occupies 1/3m3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be
  • A. 1.26 x 103Nm-2
  • B. 3.3 x104Nm-2
  • C. 1.35 x 104Nm-2
  • D. 2.2 x 104Nm-2
  • E. 105Nm-2
View Answer & Discuss (8) JAMB 1980
20
A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours?
  • A. 3.84k Wh
  • B. 7.20k Wh
  • C. 8.40k Wh
  • D. 12.00k Wh
  • E. 14.56k Wh
View Answer & Discuss (8) JAMB 1980
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