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 1111: Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg^-1] Options:
  A) 336W
  B) 450W
  C) 560W
  D) 600W
  Show Answer
  The correct answer is C .
• Question 1112: A perfect emitter or absorber of radiant energy is a Options:
  A) conductor
  B) black body
  C) white body
  D) red body
  Show Answer
  The correct answer is B .
• Question 1113: The angle between the direction of the earth's magnetic field and the horizontal is called the Options:
  A) angle of deviation
  B) magnetic declination
  C) magnetic meridian
  D) angle of dip
  Show Answer
  The correct answer is D .
• Question 1114: A plane sound wave of frequency 85.5Hz and velocity 342ms^-1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode? Options:
  A) 2m
  B) 4m
  C) 1m
  D) 3m
  Show Answer
  The correct answer is C .
• Question 1115: A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. if the speed of the object when it has moved 50m from O is 500ms^-1, what is the value of F? Options:
  A) 0.4N
  B) 100.0N
  C) 250.0N
  D) 1000.0N
  Show Answer
  The correct answer is B .
• Question 1116: Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced? Options:
  A) 2Hz
  B) 4Hz
  C) 8Hz
  D) 258Hz
  Show Answer
  The correct answer is B .
• Question 1117: Which of the following quantities are scalars? i. Electrical potential ii. Torque iii. Momentum iv. Kinetic energy Options:
  A) ii and iii only
  B) i and ii only
  C) iii and iv only
  D) i and iv only
  Show Answer
  The correct answer is D .
• Question 1118:

  A boy standing some distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms${}^{-1}$, how far is he from the cliff?

  Options:
  A) 680m
  B) 170m
  C) 34m
  D) 85m
  Show Answer
  The correct answer is D .
• Question 1119: A uniform cylindrical block of wood floats in water with one-third of its height above the water level, in a liquid of relative density 0.8, what fraction of its height will be above the liquid level? Options:
  A) $\frac{1}{6}$
  B) $\frac{1}{5}$
  C) $\frac{1}{3}$
  D) $\frac{4}{5}$
  E) $\frac{5}{6}$
  Show Answer
  The correct answer is E .
• Question 1120: In a fission process, the decrease in mass is 0.01%. How much energy could be obtained from the fission of 0.1g of the material Options:
  A) $9.0\times {10}^{9}J$
  B) $9.0\times {10}^{10}J$
  C) $6.3\times {10}^{11}J$
  D) $9.0\times {10}^{11}J$
  Show Answer
  The correct answer is A .