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 81:

  The pressure of two moles of an ideal gas at a temperature of 27^oC and volume 10^-2m³ is

  [R = 8.313 J mol^-1K^-1]

  Options:
  A) 4.99 x 10⁵ Nm^-2
  B) 9.80 x 10³ Nm^-2
  C) 4.98 x 10³ Nm^-2
  D) 9.80 x 10⁵ Nm^-2
  Show Answer
  The correct answer is A .
• Question 82: The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is Options:
  A) 0.5 $\mathrm{\Omega }$
  B) 1.0$\mathrm{\Omega }$
  C) 2.0$\mathrm{\Omega }$
  D) 4.0$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 83:

  An object moves in a circular path of radius 0.5m with a speed of 1ms${}^{-1}$. What is its angular velocity?

  Options:
  A) 8rads${}^{-1}$
  B) 4rads${}^{-1}$
  C) 1rads${}^{-1}$
  D) 2rads${}^{-1}$
  Show Answer
  The correct answer is D .
• Question 84: What part of the camera corresponds to the iris of the eye? Options:
  A) diaphragm
  B) film
  C) focusing ring
  D) lens
  E) shutter
  Show Answer
  The correct answer is A .
• Question 85: A 3m³ volume of liquid W of density 200kgm³ is mixed with another liquid L of volume 7m³ and density 150kgm^-3. the density of mixture is? Options:
  A) 165kgm^-3
  B) 100kgm^-3
  C) 265kgm^-3
  D) 350kgm^-3
  Show Answer
  The correct answer is A .
• Question 86: If a load of mass 10N stretched a cord by 1.2cm, what is the total work done? Options:
  A) 6.0 x 10^-2J
  B) 7.6 x 10^-2J
  C) 1.8 x 10^-2J
  D) 6.6 x 10^-2J
  Show Answer
  The correct answer is A .
• Question 87: The melting point of naphthalene is 78^oC. What is this temperature in kelvin Options:
  A) 100k
  B) 351k
  C) 378k
  D) 444k
  Show Answer
  The correct answer is B .
• Question 88: 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 89: When the same amount of current, I is passed through different wires under the same conditions, the rates of production of heat are Options:
  A) directly proportional to I
  B) directly proportional to the resistances of the wires
  C) directly proportional to the square of the resistances of the wires
  D) inversely proportional to I
  E) inversely proportional to the resistance of the wires
  Show Answer
  The correct answer is B .
• Question 90: What does NOT affect the rate of evaporation of a liquid Options:
  A) exposed surface area of the liquid
  B) humidity of the surroundings
  C) nature of the liquid
  D) temperature the liquid
  E) volume of the liquid.
  Show Answer
  The correct answer is E .