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Wednesday, 20 May 2026
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Physics Past Questions and Answers

Jamb 1987 Physics Questions

Question 31:
A ray of light is incident at an angle of 30o on one top surface of a parallel-sided glass block of refractive index 1.5. The ray finally emerges from the lower surface. What is the angular deviation of the emergent ray?
  • A 60<sup style='font-size: smaller;'>o</sup>
  • B 39<sup style='font-size: smaller;'>o</sup>
  • C 28<sup style='font-size: smaller;'>o</sup>
  • D 0<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 32:
Four lenses are being considered for use as a microscope objective. Which of the following focal lengths is most suitable?
  • A -5mm
  • B +5mm
  • C -5cm
  • D +5cm
View Answer & Explanation
Question 33:
If the angle of declination in a place is 10oE, calculate the true geographic bearing if the compass reads N40oE
  • A N50<sup style='font-size: smaller;'>o</sup>E
  • B N40<sup style='font-size: smaller;'>o</sup>E
  • C N30<sup style='font-size: smaller;'>o</sup>E
  • D N25<sup style='font-size: smaller;'>o</sup>E
View Answer & Explanation
Question 34:
Two capacitance of 6\(\mu\)F and 8\(\mu\)F are connected in series. What additional capacitance must be connected in series with this combination to give a total of 3\(\mu\)F
  • A 3\(\mu\)F
  • B 16\(\mu\)F
  • C 24\(\mu\)F
  • D 30\(\mu\)F
View Answer & Explanation
Question 35:
When a transformer has more secondary windings than primary windings, it
  • A Has a smaller secondary current
  • B Has a greater power output
  • C Is a step-down transformer
  • D Increases the total energy output
View Answer & Explanation