Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 51: A lamp is rated 240V, 60W. The resistance of the filament is Options:
  A) 960$\mathrm{\Omega }$
  B) 16$\mathrm{\Omega }$
  C) 15$\mathrm{\Omega }$
  D) 4$\mathrm{\Omega }$
  Show Answer
  The correct answer is A .
• Question 52:

  Aluminium is sometimes used as the leaf of an electroscope because it

  Options:
  A) is a light material
  B) is a good conductor
  C) is a good insulator
  D) can be converted into thin sheets
  Show Answer
  The correct answer is D .
• Question 53: which of the following is NOT correct? i. the pitch of a sound note depends on the frequency of vibrations. ii. the intensity of a sound note is proportional to the amplitude of vibrations. iii. beats are produced by two sources of sound because one wave is travelling faster than the other. iv. when two sources of sound of frequencies 500Hz and 502Hz are sounded together, a beat frequency of 2Hz is observed. v. the first harmonic of a tone have double the frequency of the fundamental note. Options:
  A) i and ii
  B) ii and iii
  C) i and iii
  D) iii and iv
  E) iv and v
  Show Answer
  The correct answer is A .
• Question 54: The force on a charge moving with velocity v in a magnetic field B is half of the maximum force when the angle between v and B is Options:
  A) 90^o
  B) 45^o
  C) 30^o
  D) 0^o
  Show Answer
  The correct answer is C .
• Question 55: 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 Options:
  A) 5.3cm
  B) 3.2cm
  C) 2.7cm
  D) 1.6cm
  Show Answer
  The correct answer is B .
• Question 56: What optical instrument can best be constructed with converging lenses of focal lengths 50cm and 5cm? Options:
  A) Compound microscope
  B) Galileo's telescope
  C) Terrestrial telescope
  D) Astronomical telescope
  Show Answer
  The correct answer is D .
• Question 57: A ray incident on a glass prism undergoes minimum deviation when the Options:
  A) incident angle is equal to the angle of refraction
  B) refraction angle equals 90^o
  C) incident angle equals 90^o
  D) incident angle is equal to the angle of emergence
  Show Answer
  The correct answer is D .
• Question 58: A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is Options:
  A) mh
  B) mgh
  C) $\frac{mgh}{50}$
  D) O
  Show Answer
  The correct answer is D .
• Question 59: A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is Options:
  A) 100ms^-1
  B) 120ms^-1
  C) 200ms^-1
  D) 250ms^-1
  Show Answer
  The correct answer is C .
• Question 60:

  A boy standing some distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms${}^{-1}$, how far is he from the cliff?

  Options:
  A) 680m
  B) 170m
  C) 34m
  D) 85m
  Show Answer
  The correct answer is D .