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 41:
  

  The diagram above illustrates the penetrating power of some types of radiation. X, Y and Z are likely

  Options:
  A) X = α-particle; Y = γ-ray; Z = β-particle
  B) X = α-particle; Y = β-particle; Z = γ-ray
  C) X = γ-ray; Y = α-particle; Z = β-particle
  D) X = β-particle; Y = γ-ray; Z = α-particle
  Show Answer
  The correct answer is C .
• Question 42: 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 43: If the angle of declination in a place is 10^oE, calculate the true geographic bearing if the compass reads N40^oE Options:
  A) N50^oE
  B) N40^oE
  C) N30^oE
  D) N25^oE
  Show Answer
  The correct answer is C .
• Question 44: Which of the following is TRUE of light and sound waves? Options:
  A) they both transmit energy
  B) they both need a mediumfor propagation
  C) they are both transverse waves
  D) their velocities in air are equal
  Show Answer
  The correct answer is A .
• Question 45:

  

  A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be

  I.γ-rays β-rays
  II. x-rays β-rays
  III. γ-rays x-rays
  IV. x-rays x-rays

  Options:
  A) I only
  B) III only
  C) I and II
  D) III and IV
  Show Answer
  The correct answer is A .
• Question 46:

  A reservoir is filled with liquid of density 2000 kgm${}^{-1}$. Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm${}^{-2}$ (g = 10 ms${}^{-2}$)

  Options:
  A) 0.262 m
  B) 0.664 m
  C) 0.819 m
  D) 0.455 m
  Show Answer
  The correct answer is D .
• Question 47: In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of Options:
  A) accelerating the electrons to a very high energy
  B) concentrating electrons on the target
  C) heating the anode
  D) heating the cathode
  E) producing a stream of electrons
  Show Answer
  The correct answer is A .
• Question 48:

  Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 10⁶Nm^-2 with a volume of 10^-3m³.

  [R = 8.3jmol^-1K^-1]

  Options:
  A) 201^oC
  B) 126^oC
  C) 153^oC
  D) 185^oC
  Show Answer
  The correct answer is C .
• Question 49:

  A man will exert the greatest pressurewhen he?

  Options:
  A) lies flat on his back
  B) lies on his belly
  C) stands on both feet
  D) stands on the toes of one foot
  Show Answer
  The correct answer is D .
• Question 50: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .