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 1081:

  If an object just begins to slide on a surface inclined at 30ºto the horizontal,the coefficient of friction is?

  Options:
  A) √3
  B) $\frac{\surd 3}{2}$
  C) $\frac{1}{\surd 2}$
  D) $\frac{1}{\surd 3}$
  Show Answer
  The correct answer is D .
• Question 1082: Dispersion occurs when white light passes through a glass prism because of the Options:
  A) different hidden colours in the glass
  B) different speeds of the colour in the glass
  C) defects in the glass
  D) high density of the glass
  Show Answer
  The correct answer is B .
• Question 1083: A wire of length 100.0m at 30^o has linear expansive of 2x10^-5K^-1 Calculate the length of the wire at a temperature of - 10^oC Options:
  A) 100.08m
  B) 100.04m
  C) 99.96m
  D) 99.92m
  Show Answer
  The correct answer is D .
• Question 1084:

  Which process is responsible for production of energy in stars?

  Options:
  A) Nuclear reaction
  B) Nuclear fission
  C) Nuclear fusion
  D) Radioactive decay
  Show Answer
  The correct answer is C .
• Question 1085:

  A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At what angle is the ray reflected?

  Options:
  A) 180${}^o$
  B) 90${}^o$
  C) 0${}^o$
  D) 60${}^o$
  Show Answer
  The correct answer is C .
• Question 1086:

  Rainbow formation is as a result of the combination of which of the following phenomena?
  (i) Reflection
  (ii) Dispersion
  (iii) Total internal reflection
  (iv) Refraction

  Options:
  A) (ii) and (iv) only
  B) (i), (iii) and (iv) only
  C) (ii), (iii) and (iv) only
  D) (i), (ii) and (iv) only
  Show Answer
  The correct answer is C .
• Question 1087: A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain? Options:
  A) 60
  B) 6
  C) 6 x 10^-2
  D) 6 x 10^-3
  E) 0.6
  Show Answer
  The correct answer is C .
• Question 1088: if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .
• Question 1089: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 1090: Two forces of magnitudes 7N and 3N act at right angles to each other. The angle $\theta$ between the resultant and the 7N force is given by Options:
  A) cos$\theta$ = $\frac{3}{7}$
  B) sin$\theta$ = $\frac{3}{7}$
  C) tan$\theta$ = $\frac{3}{7}$
  D) cot$\theta$ = $\frac{3}{7}$
  Show Answer
  The correct answer is C .