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Saturday, 02 May 2026
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Physics Past Questions and Answers

Jamb Physics Questions

Question 406:
Which of the following is true of sounds?
  • A Sound travels faster in air at 20<sup style='font-size: smaller;'>o</sup>C than at 30<sup style='font-size: smaller;'>o</sup>C
  • B The frequency of a given sound wave changes when it crosses the boundary seperating two media
  • C The wavelength of a given sound wave in air decreases as the temperature increases
  • D Sound waves cannot be reflected
View Answer & Explanation
Question 407:
A lens of focal length 12.0cm forms an upright image three times the size of a real object. The distance between the object and the images is
  • A 8.0cm
  • B 16.0cm
  • C 24.0cm
  • D 32.0cm
View Answer & Explanation
Question 408:
In which of the following arrangements is the wavelength in an increasing order?
  • A Gamma rays, infra-red rays, x-rays, radiowaves
  • B Gamma rays, x-rays, infra-red ray, radiowaves
  • C Radiowaves, x-rays, gamma ray, infra-red rays
  • D Infra-red rays, radiowaves, x-rays, gamma rays
View Answer & Explanation
Question 409:
If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?
  • A Sin<sup style='font-size: smaller;'>-1</sup>\(\frac{1}{2}\)
  • B Sin<sup style='font-size: smaller;'>-1</sup>\(\frac{2}{3}\)
  • C Sin<sup style='font-size: smaller;'>-1</sup>\(\frac{3}{4}\)
  • D Sin<sup style='font-size: smaller;'>-1</sup>\(\frac{8}{9}\)
View Answer & Explanation
Question 410:
A dentist obtains a linear magnification of 4 of a hole in a tooth by placing a concave mirror at a distance, of 2.0cm from the tooth. The radius of Curvature of the mirror is
  • A 5.3cm
  • B 3.2cm
  • C 2.7cm
  • D 1.6cm
View Answer & Explanation