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 1091: 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 1092: Find the frequencies of the first three harmonics of a piano string of length 1.5m, if the velocity of the wave on the string is 120ms^-1 Options:
  A) 40Hz, 80Hz, 120Hz
  B) 80Hz, 160Hz, 240Hz
  C) 180Hz, 360Hz, 540Hz
  D) 369Hz, 180Hz, 90Hz
  Show Answer
  The correct answer is A .
• Question 1093: A gas at a volume of V₀ in a container at pressure P₀ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant? Options:
  A) P₀/5
  B) 4P₀/5
  C) P₀
  D) 5P₀
  Show Answer
  The correct answer is D .
• Question 1094:

  

  The diagram above shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective content of P,Q and R

  Options:
  A) Alcohol, mercury and alcohol
  B) Air, alcohol and mercury
  C) Mercury, alcohol and mercury
  D) Air, mercury and alcohol
  Show Answer
  The correct answer is A .
• Question 1095:

  In an AC circuit, resonance occurs when the impedance of the circuit is:

  Options:
  A) Zero
  B) Maximum
  C) Equal to the capacitive reactance of the circuit
  D) Minimum
  Show Answer
  The correct answer is D .
• Question 1096: What type of reaction is represented by the following scheme? ${}_1^{2}X$ + ${}_1^{2}Y$ + ${}_2^{3}Z$ + ${}_0^{1}n$ + energy Options:
  A) Fusion reaction
  B) Fission reaction
  C) Chain reaction
  D) Radioactive decay
  Show Answer
  The correct answer is A .
• Question 1097:

  

  The diagram above shows forces 4N, 6N, 10N and 8N which act at a point O in the directions indicated. the net horizontal force is

  Options:
  A) 13N
  B) 17N
  C) √3N
  D) 7√3N
  Show Answer
  The correct answer is A .
• Question 1098: The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark? Options:
  A) 22.5^oC
  B) 29.0^oC
  C) 90.0^oC
  D) 100.0^oC
  Show Answer
  The correct answer is A .
• Question 1099: which of the following materials is a conductor? Options:
  A) Glass
  B) Wax
  C) Sodium
  D) Plastic
  Show Answer
  The correct answer is C .
• Question 1100: A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is because Options:
  A) the tension in the string decreases as the solid is lifted
  B) the mass of the solid has increased
  C) the solid apparently weighs less when completely immersed in water than when partially immersed
  D) part of the solid still in water is exerting more force on the string
  E) the solid is no longer in equilibrium with water
  Show Answer
  The correct answer is C .