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 1781: A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave? Options:
  A) 0.5Hz
  B) 4.0Hz
  C) 10.0Hz
  D) 100.0Hz
  E) 200.0Hz
  Show Answer
  The correct answer is D .
• Question 1782: Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms^-2. [g = 10ms^-2] Options:
  A) 686N
  B) 595N
  C) 581N
  D) 105N
  Show Answer
  The correct answer is D .
• Question 1783: Musical instruments playing the same note can be distinguished from one another owing to the differences in their Options:
  A) quality
  B) pitch
  C) intensity
  D) loudness
  Show Answer
  The correct answer is A .
• Question 1784:

  

  Which of the following figures gives the correct resultant R of two vectors P and Q?

  Options:
  A) I
  B) II
  C) III
  D) IV
  E) V
  Show Answer
  The correct answer is D .
• Question 1785: The vacuum in a thermos flask helps to reduce heat transfer by? Options:
  A) convection and radiation
  B) convection and conduction
  C) conduction and radiation
  D) radiation only
  Show Answer
  The correct answer is B .
• Question 1786: An object of mass 100g projected vertically upwards from the ground level has a velocity of 20ms^-1 at a height of 10m. calculate its initial kinetic energy at the ground level.[g = 10ms^-2, neglect air resistance] Options:
  A) 10 J
  B) 20 J
  C) 30 J
  D) 50 J
  Show Answer
  The correct answer is C .
• Question 1787:
  

  Consider the three forces acting at O and in equilibrium as shown in the figure. Which of the following equations is/are CORRECT?

  I.P${}_1$ cos${\theta }_1$ = p${}_1$ cos ${\theta }_2$

  II. P${}_3$ = P${}_1$ cos ${\theta }_4$ + P${}_{2}co{s}_2$

  III. P${}_1\sin {\theta }_1=P_2\sin {\theta }_2$

  Options:
  A) I only
  B) II only
  C) III only
  D) I, II and III only
  Show Answer
  The correct answer is C .
• Question 1788: A concave mirror has a radius of curvature of 36cm. At what distance from the mirror should an object be placed to give a real image three times the size of the object? Options:
  A) 12cm
  B) 24cm
  C) 48cm
  D) 108cm
  Show Answer
  The correct answer is B .
• Question 1789: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 1790: If an object just begins to slide on a surface inclined at 30^o to the horizontal,the coefficient of friction is Options:
  A) √3
  B) ^√3/₂
  C) ¹/_√2
  D) ¹/_√3
  Show Answer
  The correct answer is D .