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 961:

  I. A liquid boils when its saturated vapor pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to an increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decreases the boiling point

  Which of the above combinations are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III only
  B) I, II, III, and IV
  C) I, II, and IV
  D) II, III, and IV
  Show Answer
  The correct answer is A .
• Question 962:

  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 963: A magnetic field is said to exist at a point if a force is Options:
  A) exerted on a stationary charge at the point
  B) exerted on a moving charge at the point
  C) deflected at the point
  D) strengthened at the point
  Show Answer
  The correct answer is B .
• Question 964: What will happen to the boiling point of pure water when it is heated in a place 30m below sea level? Options:
  A) It will be more than 100 ^oC
  B) It will be last than 100 ^oC
  C) It will still be at 100 ^oC
  D) It will be fluctuating
  Show Answer
  The correct answer is A .
• Question 965: What is the velocity of sound at 100 ^oC if the velocity of sound at 0 ^oC is 340ms ^-1? Options:
  A) 497m^-1
  B) 440m^-1
  C) 397m^-1
  D) 240m^-1
  Show Answer
  The correct answer is B .
• Question 966: Heat is radiated by hot objects in the form Options:
  A) x-rays
  B) light energy
  C) infrared rays
  D) solar energy
  Show Answer
  The correct answer is C .
• Question 967: A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms^-1 from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is(take g = 10ms^-2) Options:
  A) 5 J
  B) 10 J
  C) 15 J
  D) 20 J
  Show Answer
  The correct answer is C .
• Question 968: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 969:

  I. The earth is not spherical but elliptical in shape

  II. Variation in latitude and longitude

  III. Rotation of the earth on its axis

  IV. Variation in the density of the earthOn which combination of the above does the weight of an object vary on the earth's surface?

  Options:
  A) I, II, III and IV
  B) II, III and IV only
  C) I, II and III only
  D) I and II only
  Show Answer
  The correct answer is D .
• Question 970: The following are some units i. Ns ii. Mm iii. Nm^-2 iv. J^oK^-1. What are the units of latent heat? Options:
  A) i
  B) ii
  C) iii
  D) iv
  Show Answer
  The correct answer is D .