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Physics Past Questions

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281

The sharpness of the boundary of the shadow of an object is determined by the

  • A. intensity of light striking the object
  • B. rays of light passing through the object
  • C. nature of the object
  • D. opacity of the object
View Answer & Discuss (31) JAMB 2005
282

A thin converging lens has a power of 4.0 diopters determined its focal length.

  • A. 2.50m
  • B. 0.03m
  • C. 5.00m
  • D. 0.25m
View Answer & Discuss (11) JAMB 2005
283
A real image three times the size of an object is formed 24cm from a converging mirror. what is the focal length of the mirror.
  • A. 16cm
  • B. 6cm
  • C. 8cm
  • D. 12cm
View Answer & Discuss (12) JAMB 2005
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284

The pair of physical quantities consisting of vectors only are

  • A. momentum and power
  • B. velocity and distance
  • C. displacement and torque
  • D. accelaration and speed
View Answer & Discuss (6) JAMB 2005
285
In an ideal wheel an axle system, R stand for the radius of the wheel and r is the radius of the axle. the mechanical advantage is
  • A. (R/r)2
  • B. r/R
  • C. (r/R)2
  • D. R/r
View Answer & Discuss (5) JAMB 2005
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