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Physics 1986 JAMB Past Questions

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36

The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 10\(^8\)ms\(^{-1}\), then the frequency of the ultraviolet radiation is

  • A. 1.3 x 1015Hz
  • B. 7.5 x 105Hz
  • C. 1.2 x 1011Hz
  • D. 7.5 x 1014Hz
View Answer & Discuss (9) JAMB 1986
37

Which of the following is most strongly deflected by magnetic field?

  • A. \(\gamma\) - rays
  • B. X- particle
  • C. \(\beta\) - particles
  • D. X - rays
View Answer & Discuss (2) JAMB 1986
38
When a box of mass 45kg, is given an initial speed of 5ms-1 it slides along a horizontal floor a distance of 3m before coming to a rest. what is the coefficient of kinetic friction between the box and the floor? (G = 10ms-2)
  • A. \( \frac{5}{6} \)
  • B. \( \frac{5}{12} \)
  • C. \( \frac{1}{3} \)
  • D. \( \frac{2}{3} \)
View Answer & Discuss (23) JAMB 1986
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39

In fig 9 the value of R is

  • A. 3Ω
  • B. 4Ω
  • C. 5Ω
  • D. 6Ω
View Answer & Discuss (9) JAMB 1986
40
if the fig above E is an accumulator with negligible internal resistance. and the EMF 9.0V, The the total current is
  • A. 0.3A
  • B. 0.8A
  • C. 1.0A
  • D. 1.8A
View Answer & Discuss (8) JAMB 1986
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