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 981: A plastic sphere floats in water with 50% of its volume submerged. if it floats in glycerine with 40% of its volume submerged,the density of the glycerine is? Options:
  A) 1400 kgm^-3
  B) 1250 kgm^-3
  C) 500 kgm^-3
  D) 1000 kgm^-3
  Show Answer
  The correct answer is B .
• Question 982: A simple cell with mercury-amalgamated zinc electrode prevents Options:
  A) local actions
  B) polarization
  C) buckling
  D) degradation
  Show Answer
  The correct answer is A .
• Question 983: A stone, Q is thrown with velocity U at an angle of 75^o to the horizontal. Another stone R is thrown with the same velocity U but with an angle of 15^o to the horizontal. The ranges covered by the stones will be Options:
  A) greater for Q
  B) greater for R
  C) the same for Q and R
  D) greater for the heavier of the two stones
  Show Answer
  The correct answer is C .
• Question 984: A cube of side 10cm and mass 0.5kg floats in a liquid with only $\frac{1}{5}$ of its height above the liquid surface. What is the relative density of the liquid? Options:
  A) 0.125cm^-1
  B) 0.250gcm^-1
  C) 0.625cm^-1
  D) 2.500cm^-1
  Show Answer
  The correct answer is C .
• Question 985: A band of 500 rectangular loops of wire of area 20 cm by 20 cm, encloses a region of magnetic field which charges from 1.0T to 0.4T within 5 seconds, calculate the induced e.m.f. Options:
  A) 5.60 v
  B) 24.00 v
  C) 0.24 v
  D) 2.40 v
  Show Answer
  The correct answer is D .
• Question 986: Which of the following types of waves cannot travel through a vacuum? Options:
  A) sound waves
  B) light waves
  C) infra-red waves
  D) x-radiation
  E) redio waves
  Show Answer
  The correct answer is A .
• Question 987: What is the magnitude of the couple which acts on a rotating circular disc of radius 2m, if a constant tangential force of 2N is responsible for the rotation. Options:
  A) 15Nm
  B) 25Nm
  C) 3Nm
  D) 4Nm
  Show Answer
  The correct answer is D .
• Question 988: What is the length of liquid column in a barometer tube that would support an atmospheric pressure of 102000Nm^-2 if the density of the liquid is 2600kgm^-3? [g = 10ms^-2] Options:
  A) 0.75m
  B) 0.76m
  C) 3.92m
  D) 39.23m
  Show Answer
  The correct answer is C .
• Question 989: The speed of light in air is 3 x 10⁸ms^-1. If the refractive index of light from air-to-water is $\frac{4}{3}$, then which of the following is the correct value of the speed of light in water? Options:
  A) 4 x 10⁸ms^-1
  B) 2.25 x 10⁸ms^-1
  C) $\frac{4}{9}$ x 10⁸ms^-1
  D) 2.25 x 10²ms^-1
  E) 4.33 x 10⁸ms^-1
  Show Answer
  The correct answer is B .
• Question 990:

  

  For the wave motion represented above, the wavelength is given by

  Options:
  A) p
  B) q
  C) r
  D) s
  E) t
  Show Answer
  The correct answer is D .