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 251:

  Which expression gives magnetic flux?

  Options:
  A) qVB sin$\theta$
  B) $\frac{\mu \varphi I}{2\pi r}$
  C) BA cos $\theta$
  D) -N $\frac{d\varphi }{dt}$
  Show Answer
  The correct answer is C .
• Question 252: A stone of mass 0.7 kg is projected vertically upward with a speed of 5 ms-1. Calculate the maximum height reached. [g =10ms^-2] Options:
  A) 1.25m
  B) 1.50m
  C) 2.50m
  D) 3.75m
  E) 5.00Nm
  Show Answer
  The correct answer is A .
• Question 253:

  A piece of substance of specific heatcapacity 450Jkg${}^{-1}$k${}^1$ falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms${}^{-2}$]

  Options:
  A) $\frac{2}{9}$ºC
  B) $\frac{4}{9}$ºC
  C) $\frac{9}{2}$ºC
  D) $\frac{9}{4}$ºC
  Show Answer
  The correct answer is B .
• Question 254: Which of the following statements is true of nuclear fission? Options:
  A) Heavy nuclei combine to form new element
  B) Protons are used in bombarding heavy nucleus
  C) The sum of the masses of the products is greater than the mass of the original substance
  D) Two light nuclei are made to combine to form a heavy nucleus
  E) Very large amount of energy is released.
  Show Answer
  The correct answer is E .
• Question 255: The defect of the eye lens which occurs as a result of weak ciliary muscles is called Options:
  A) astigmatism
  B) hypermetropia
  C) myopia
  D) presbyopia
  E) spherical aberration
  Show Answer
  The correct answer is D .
• Question 256:

  A supply of 400V is connected across capacitors of 3μf and 6μf in series. Calculate the charge.

  Options:
  A) 8 x 10${}^{-4}$C
  B) 4 x 10${}^{-2}$C
  C) 8 x 10${}^{-3}$C
  D) 4 x 10${}^{-8}$C
  Show Answer
  The correct answer is A .
• Question 257: Which of the following is a vector? Options:
  A) Electric charge
  B) Electric field
  C) Electrical potential difference
  D) Electrical capacitance
  Show Answer
  The correct answer is B .
• Question 258: In measuring high frequency a.c, the instrument used is the Options:
  A) d.c ammeter
  B) moving coil ammeter
  C) moving iron ammeter
  D) hot wire ammeter
  Show Answer
  The correct answer is D .
• Question 259: A tap supplies water at 25^oC while another supplies water at 75^oC. If a man wishes to bathe with water at 40^oC, the ratio of the mass of cold water to the mass of hot water required is Options:
  A) 1 : 3
  B) 15 : 8
  C) 7 : 3
  D) 3 : 1
  Show Answer
  The correct answer is C .
• Question 260:

  

  If a ray traveling in air is incident on a transparent medium as shown in the diagram, the refractive index of the medium is given as

  Options:
  A) $\frac{\cos \beta }{\sin \alpha }$
  B) $\frac{\cos \alpha }{\sin \beta }$
  C) $\frac{\sin \alpha }{\sin \beta }$
  D) $\frac{\sin \beta }{\sin \alpha }$
  Show Answer
  The correct answer is B .