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 1241: 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 1242: Which of the following statements is NOT true of $\gamma$-rays? Options:
  A) $\gamma$-rays belong to the electromagnetic spectrum
  B) $\gamma$-rays do not carry an electron charge
  C) $\gamma$-rays obey the inverse cube law in air
  D) the thickness of aluminium which stops b-particule has a negligible effect on $\gamma$-radiation
  E) the difference between $\gamma$-rays and X-rays is that $\gamma$-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms
  Show Answer
  The correct answer is C .
• Question 1243:

  In what range oftemperature is the expansion of water anomalous?

  Options:
  A) +208${}^o$C to +212${}^o$C
  B) -80${}^o$C + -76${}^o$C
  C) 0${}^o$C to +4${}^o$C
  D) -4${}^o$C to +0${}^o$C
  Show Answer
  The correct answer is C .
• Question 1244:

  A bar magnet is divided into two pieces, which of the following statement is correct?

  Options:
  A) two new magnets are created
  B) the magnetic field of each separate piece becomes stronger
  C) the electric field is created
  D) the bar magnet is demagnetized
  Show Answer
  The correct answer is A .
• Question 1245:

  "Sum of all forces acting on a body is zero." This condition represents equilibrium'

  Options:
  A) First condition
  B) Second condition
  C) Third condition
  D) Fourth condition
  Show Answer
  The correct answer is A .
• Question 1246: A transistor function mainly as a Options:
  A) switch and amplifier
  B) rectifier and an amplifier
  C) charge storer and an amplifier
  D) charge storer and a switch
  Show Answer
  The correct answer is A .
• Question 1247: A radio station broadcasts at a frequency of 400KHz. If the speed of the wave is 3.0 ×10-8 ms-1, calculate the wavelength of the radio wave. Options:
  A) 1.3 × 10²m
  B) 3.0 × 10²m
  C) 2.4 × 10²m
  D) 5.0 × 10²m
  E) 7.5 × 10²m
  Show Answer
  The correct answer is E .
• Question 1248: The specific latent heat of fusion of lead is the amount of heat required to Options:
  A) melt lead at its melting point
  B) heat a unit mass of lead through 1^oC
  C) change the state of a unit mass of lead at its melting point
  D) change the state of a unit mass of lead at its boiling point
  Show Answer
  The correct answer is C .
• Question 1249: the ray which causes gas molecules to glow is known as Options:
  A) cathode ray
  B) anode ray
  C) molecular ray
  D) gamma ray
  Show Answer
  The correct answer is A .
• Question 1250: The falling of light energy on a metal such that electrons are liberated from the metal is called Options:
  A) electron effect
  B) metal electron effect
  C) metal emission
  D) photoelectric effect
  E) photoemission
  Show Answer
  The correct answer is E .