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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1998 Physics Questions

Question 31:
The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is
  • A T – n
  • B T (1 + 1/n)
  • C T (1-1/n)
  • D T (1/n - 1)
View Answer & Explanation
Question 32:
A man wears convex lens glasses of focal length 30cm in order to correct his eye defect. instead of the optimum 25cm, his least distance of distinct vision is
  • A 14cm
  • B 28cm
  • C 75cm
  • D 150cm
View Answer & Explanation
Question 33:
Which of the following are true about the infra-red radiation? i. it is invisible ii. it is called heat ray iii. its frequency is higher than that of blue light iv. it travels as a transverse wave
  • A I, ii, iii and iv
  • B I, ii, iv only
  • C I, iii, iv only
  • D Ii, iii, iv only
View Answer & Explanation
Question 34:
The force of repulsion between two point positive charges 5\(\mu\)C and 8\(\mu\)C separated at a distance of 0.02 map art is. [\(\frac{1}{4{\pi}{\varepsilon}_o}\) = 9 x 109Nm2C-2]
  • A 1.8 x 10<sup style='font-size: smaller;'>-10</sup>N
  • B 9.0 x 10<sup style='font-size: smaller;'>-8</sup>N
  • C 9.0 x 10<sup style='font-size: smaller;'>2</sup>N
  • D 4.5 x 10<sup style='font-size: smaller;'>3</sup>N
View Answer & Explanation
Question 35:
An ebonite rod rubbed with fur attracts a glass rod rubbed with silk because
  • A Ebonite has a negative charge while glass has a positive charge
  • B Ebonite has a positive charge while glass has a negative charge
  • C Both have negative charges
  • D Both have positive charges
View Answer & Explanation