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 571: Which of the following devices may be used to step up the voltage in a d.c. circuit? Options:
  A) a step-up transformer
  B) a d.c. generator
  C) a wattmeter
  D) an induction coil
  Show Answer
  The correct answer is B .
• Question 572: The blade of a hoe feel colder to touch in the morning than the wooden handle because the Options:
  A) handle is a better conductor of heat than blade
  B) handle contains stored energy in form of heat
  C) blade is a better conductor of heat than the handle
  D) blade is placed at a lower temperature than the heat
  Show Answer
  The correct answer is C .
• Question 573: If the fundamental frequency of a closed pipe organ on a day when the speed of sound is 340ms^-1 is 170Hz, then the length of the pipe is Options:
  A) 50cm
  B) 70cm
  C) 100cm
  D) 150cm
  E) 200cm
  Show Answer
  The correct answer is A .
• Question 574:

  In Sunlight, a blue flower looks blue because we see the flower by the light it

  Options:
  A) receives from our eyes
  B) disperses
  C) absorbed
  D) reflect
  Show Answer
  The correct answer is D .
• Question 575:

  A beam of light travelling in water is incident on a glass which is immersed in the water. The incident beam makes an angle of ${40}^o$ with the normal. Calculate the angle of refraction in the glass.

  [Refractive index of water = 1.33, Refractive index of glass = 1.5]

  Options:
  A) ${29.36}^o$
  B) ${25.37}^o$
  C) ${37.21}^o$
  D) ${34.75}^o$
  Show Answer
  The correct answer is D .
• Question 576:

  Shadows and eclipses result from the

  Options:
  A) refraction of light
  B) reflection of light
  C) defraction of light
  D) rectilinear propagation of light
  Show Answer
  The correct answer is D .
• Question 577: All the heat generated in a 5$\mathrm{\Omega }$ resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid? Options:
  A) 120J
  B) 60Jg^-1
  C) 120Jg^-1
  D) 1500J
  E) 1500Jg^-1
  Show Answer
  The correct answer is C .
• Question 578: A vehicle of mass m is driven by an engine of power P from rest. Find the minimum time it will take to acquire a speed Options:
  A) $\frac{m{v}^2}{t}$
  B) $\frac{m{v}^2}{2t}$
  C) $\frac{mv}{t}$
  D) $\frac{mv}{2t}$
  Show Answer
  The correct answer is A .
• Question 579: A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is? Options:
  A) 2.55 x 10⁵ Ωm
  B) 2.55 x 10² Ωm
  C) 3.93 x 10^-6 Ωm
  D) 3.93 x 10^-8 Ωm
  Show Answer
  The correct answer is D .
• Question 580:

  A metal rod has a length of 100cm at 200${}^{o}C$. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is 2 $\times$ 10${}^{-5}{C}^{-1}$

  Options:
  A) 200${}^o$C
  B) 300${}^o$C
  C) 100${}^o$C
  D) -100${}^o$C
  Show Answer
  The correct answer is D .