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 821: Which of the following is correct about an electric cell? Options:
  A) Primary cell produces a large current for a long time
  B) Secondary cell has a very high internal resistance
  C) Primary cell has a very low internal resistance
  D) Secondary cell has a very low internal resistance
  Show Answer
  The correct answer is D .
• Question 822: If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object Options:
  A) Is quadrupled
  B) Is halved
  C) Remains the same
  D) Is double
  Show Answer
  The correct answer is D .
• Question 823: As a positively charge rod is brought nearer to the top cap of a positively charged gold leaf electroscope, the divergence of the leaves will Options:
  A) decrease to zero
  B) steadily increase
  C) decrease to zero and then increase
  D) remain constant
  E) increase to a maximum and then decrease
  Show Answer
  The correct answer is B .
• Question 824:

  I. Temperature.

  II. Density of air molecules

  III. Pressure

  IV. Pitch

  Which of the above will affect the velocity of sound in the air

  Options:
  A) I and II only
  B) II and IV only
  C) I,II and IV only
  D) I,II,III nad IV
  Show Answer
  The correct answer is A .
• Question 825: If two inductors of inductances 3H and 6H are arranged in series, the total inductance is Options:
  A) 9.0H
  B) 18.0H
  C) 0.5H
  D) 2.0H
  Show Answer
  The correct answer is A .
• Question 826: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 827:

  

  The total resistance measured at PQ in the diagram above is

  Options:
  A) 18.0Ω
  B) 11.0Ω
  C) 4.0Ω
  D) 2.0Ω
  Show Answer
  The correct answer is C .
• Question 828: An ice cube floats in a glass of water filled to the brim. What happens when the ice melts? Options:
  A) The water level remains the same
  B) there is a drop in the level of water in the glass due to condensation on its outside
  C) the water in the glass overflows
  D) the level of water drops because melted ice occupies less volume
  E) none of the above is correct
  Show Answer
  The correct answer is A .
• Question 829:

  I. The frictional force is independent of the area of the surfaces in conduct

  II. The frictional force depends on the nature of the surfaces in contact

  III. The frictional force depends on the speed of sliding

  IV. The frictional force is directly proportional to the normal reaction.Which combination of the above is true of sliding friction?

  Options:
  A) I, III and IV
  B) I, II and IV
  C) I, II and III
  D) II, III and IV
  Show Answer
  The correct answer is B .
• Question 830: Which of the following is used as a depolarizer in a Denial cell? Options:
  A) Ammonium chloride
  B) Copper (II) tetra Oxo sulphate (VI) solution
  C) Manganese (IV) oxide
  D) Tetraoxo sulphate (VI) acid
  E) Water
  Show Answer
  The correct answer is B .