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 2301: At low humidity in an environment, the human skin is usually? Options:
  A) damp and rough
  B) damp and smooth
  C) dry and rough
  D) dry and smooth
  Show Answer
  The correct answer is C .
• Question 2302: Calculate the work done when a force of 20N stretches a spring by 50mm. Options:
  A) 0.5J
  B) 1.5J
  C) 2.0J
  D) 2.5J
  Show Answer
  The correct answer is A .
• Question 2303: Which of the following features is NOT a characteristic of natural radioactivity? Options:
  A) Radioactivity is a nuclear phenomenon
  B) Radioactivity is exhibited only by elements of mass number greater than 206
  C) The radioactivity of an element is affected by electric and magnetic fields in the surroundings
  D) Radioactive substances emits three types of radiations, a-rays, $\beta$-rays and y-rays
  E) The radioactive element is transformed into a new element
  Show Answer
  The correct answer is B .
• Question 2304: A stream is flowing at 0.75ms^-1 and a boat heading perpendicular for the stream landed at the opposite bank at an angle of 30°. Calculate the velocity of the boat. Options:
  A) 1.50ms^-1
  B) 1.00ms^-1
  C) 0.86ms^-1
  D) 0.65ms^-1
  Show Answer
  The correct answer is C .
• Question 2305: If ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_a is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .
• Question 2306: 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 2307: Which device does NOT make use of the magnetic effects of an electric current? Options:
  A) hot-wire ammeter
  B) moving-coil ammeter
  C) moving-coil loudspeaker
  D) moving-iron ammeter
  E) telephone earpiece
  Show Answer
  The correct answer is A .
• Question 2308: An a.c. generator can be converted into a d.c. generator by replacing Options:
  A) the slip rings with split-ring commutators
  B) the slip rings with armatures
  C) the split-rings with slip rings
  D) the split-rings with brushes
  E) the brushes with slip-ring commutators.
  Show Answer
  The correct answer is A .
• Question 2309: The work done in extending a spring by 40mm is 1.52J. Calculate the elastic’constant of the spring. Options:
  A) 38.8 Nm^-1
  B) 60.8 Nm^-1
  C) 190.0 Nm^-1
  D) 1900.0 Nm^-1
  E) 3800.0 Nm^-1
  Show Answer
  The correct answer is D .
• Question 2310: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .