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 301: In an ideal wheel an axle system, R stand for the radius of the wheel and r is the radius of the axle. the mechanical advantage is Options:
  A) (R/r)²
  B) r/R
  C) (r/R)²
  D) R/r
  Show Answer
  The correct answer is D .
• Question 302: Which statement is NOT correct about Rutherford’s model of the atom? Options:
  A) The diameter of the nucleus is of the order of 10-15m
  B) The mass of an atom is concentrated in the nucleus
  C) The model is applicable to atoms with one electron in the outer shell
  D) The nucleus of an atom is positively charged
  E) The nucleus is surrounded by an electron cloud.
  Show Answer
  The correct answer is C .
• Question 303: On an a.c generator, which of the following does not apply? Options:
  A) field magnet
  B) commutator
  C) armature
  D) slip rings
  E) carbon brushes
  Show Answer
  The correct answer is B .
• Question 304:

  

  The figure above shows two similar bulbs X and Y connected to suitable power supply with F as an appropriate fuse rating, if the filament of X breaks then the

  Options:
  A) Brightness Of Y will reduce
  B) Brightness Of Y will remain constant
  C) Brightness Of Y will increase
  D) fuse F will blow
  Show Answer
  The correct answer is C .
• Question 305: A quantity of gas occupies a certain volume when the temperature is -73^oC and the pressure is 1.5 atmospheres. If the pressure is increased to 4.5 atmospheres and the volume is halved at the same time, what will be the new temperature of the gas? Options:
  A) 573^oC
  B) 327^oC
  C) 300^oC
  D) 110^oC
  E) 27^oC
  Show Answer
  The correct answer is E .
• Question 306:

  A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is

  Options:
  A) twice the e.m.f of the accumulator
  B) less than the e.m.f by the potential drop across the resistor
  C) zero
  D) the same as the e.m.f.
  E) greater than
  Show Answer
  The correct answer is B .
• Question 307: Which of the following statements are correct about an object in equilibrium under parallel forces? i. the total clockwise moments of the forces about any point equals the total anti-clockwise moments about the same point. ii. the total forces in one direction equals the total forces in the opposite direction. iii. the resolved components along the x-axis equals the resolved components along the y-axis. Options:
  A) i and ii only
  B) i and iii only
  C) ii and iii
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .
• Question 308:

  A block of mass 2kg resting on a smooth horizontal plane is acted upon simultaneously by two-forces, 10N due North and 10N due East. The magnitude of the acceleration produced by the force on the block is

  Options:
  A) 0.10ms^-2
  B) 7.07ms^-2
  C) 10.00ms^-2
  D) 14.10ms^-2
  E) 20.00ms^-2
  Show Answer
  The correct answer is B .
• Question 309: The particles emitted when ${}_{19}^{39}K{\text{ decay to }}_{19}^{39}K$ is Options:
  A) gamma
  B) beta
  C) electron
  D) alpha
  Show Answer
  The correct answer is A .
• Question 310: A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X. Options:
  A) 5/3
  B) 4/3
  C) 3/4
  D) 7/10
  Show Answer
  The correct answer is C .