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 1831: Which of the following is a correct explanation of the inertia of a body? Options:
  A) ability to overcome the earth's gravity
  B) reluctance to stop moving
  C) readiness to start moving
  D) reluctance to start moving and its readiness to stop moving once it has begun to move
  E) reluctance to start moving its reluctance to stop moving once it has begun to move
  Show Answer
  The correct answer is E .
• Question 1832:
  

  A 200 kg load is raised using a 110 m long lever as shown in the diagram above. The load is 10m from the pivot P. If the efficiency of the the lever is 80%, find the effort E required to lift the load.

  [Take g = 10ms-2]

  Options:
  A) 250
  B) 300
  C) 450
  D) 200
  Show Answer
  The correct answer is A .
• Question 1833: The spiral spring of a spring balance is 25.0cm long when 5N hangs on it and 30cm long, when the weight is 10N. What is the length of the spring if the weight is 3N assuming Hooke's law is obeyed? Options:
  A) 15.0cm
  B) 17.0cm
  C) 20.0cm
  D) 23.0cm
  Show Answer
  The correct answer is D .
• Question 1834: At what respective values of X, Y and Z would the unit of force, the newton, be dimensionally equivalent to M^xL^yT^z? Options:
  A) -1, 1, 2
  B) 1, 1, -2
  C) 1, -1, 2
  D) -1, 1, -2
  Show Answer
  The correct answer is B .
• Question 1835: The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is Options:
  A) 1600N
  B) 400N
  C) 160N
  D) 40N
  Show Answer
  The correct answer is A .
• Question 1836:

  According to kinetic molecular model, in gases

  Options:
  A) The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern
  B) The particles occur in clusters with molecules slightly farther apart
  C) The molecule are very fast apart and occupy all the space made available
  D) The particle vibrate about fixed positions and are held together by the strong intermolecular bonds between them
  Show Answer
  The correct answer is C .
• Question 1837:
  

  In the diagram above, if the south poles of two magnets stroke a steel bar, the polarities at X and Y will respectively be

  Options:
  A) south and north
  B) north and south
  C) north and north
  D) south and south
  Show Answer
  The correct answer is C .
• Question 1838:

  I. Force (N)

  II.Torque (NM)

  III. Current (A)

  IV. Power (W)

  Which of the above are the correct S. I: units of the quantities indicated?

  Options:
  A) I and II only
  B) I and III only
  C) I, II and III only
  D) I, III and IV only
  Show Answer
  The correct answer is D .
• Question 1839: A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is Options:
  A) 4800 cal
  B) 6000 cal
  C) 2400J
  D) 240k cal
  E) 6000J
  Show Answer
  The correct answer is E .
• Question 1840: A man standing 2 m from a charcoal fire is warmed mainly by Options:
  A) convection
  B) radiation
  C) refraction
  D) conduction
  Show Answer
  The correct answer is B .