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 1541: The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is Options:
  A) 1600N
  B) 400N
  C) 160N
  D) 40N
  Show Answer
  The correct answer is A .
• Question 1542:

  If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

  Options:
  A) 24 years
  B) 20 years
  C) 10 years
  D) 2 years
  Show Answer
  The correct answer is B .
• Question 1543: The bond between silicon and germanium is Options:
  A) covalent
  B) ionic
  C) dative
  D) electrovalent
  Show Answer
  The correct answer is A .
• Question 1544: A capacitor of 20 x 10^-12F and an inductor are joined in series. The value of the inductance that will give the circuit a resonance frequency of 200kHz is Options:
  A) I/16 H
  B) I/8 H
  C) I/64 H
  D) I/32 H
  Show Answer
  The correct answer is D .
• Question 1545:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 1546: A wire of 5Ω resistance is drawn out so that its new length is two times the original length. If the resistivity of the wire remains the same and the cross-sectional area is halved, the new resistance is Options:
  A) 40Ω
  B) 20Ω
  C) 10Ω
  D) 5Ω
  Show Answer
  The correct answer is B .
• Question 1547: In photoelectric effect, electrons will leave the metal surface when illuminated by light of appropriate frequency if the photon energy is Options:
  A) greater than the work function
  B) less than the work function
  C) equal to the work function
  D) equal to the maximium kinetic energy of the electron
  Show Answer
  The correct answer is A .
• Question 1548: Which of the following may be used to explain a mirage? i. layers of air near the road surface have varying refractive indices in hot weather. ii. road surfaces sometimes become good reflectors in hot weathers. iii. light from the sky can be reflected upwards after coming close to the road surface. Options:
  A) ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is C .
• Question 1549: Which of the following is not luminous object? Options:
  A) The sun
  B) The moon
  C) light candle
  D) Star
  Show Answer
  The correct answer is B .
• Question 1550: The particle that is responsible for the nuclear fission in a nuclear reactor is Options:
  A) neutron
  B) prton
  C) electron
  D) photon
  Show Answer
  The correct answer is A .