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 351: Two metals P and Q of length l₁ and l₂ are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of lengths is 3:4. What is the ratio of increase in length of P to Q? Options:
  A) 7:5
  B) 5:7
  C) 1:2
  D) 2:1
  Show Answer
  The correct answer is C .
• Question 352:

  The motion of a body is simple harmonic if the?

  Options:
  A) acceleration is always directed towards a fixed point
  B) path of motion is a straight line
  C) acceleration is proportional to the square of the distance from a fixed point
  D) acceleration is constant and directed towards a fixed point
  Show Answer
  The correct answer is A .
• Question 353:

  Water is not a good thermometric liquid because it?

  Options:
  A) expands unevenly between 0 ºC and 4 ºC
  B) maintains fixed density
  C) has low freezing point
  D) wets glass
  Show Answer
  The correct answer is D .
• Question 354:

  One of the following is a scalar quantity?

  Options:
  A) weight
  B) momentum
  C) potential energy
  D) displacement
  Show Answer
  The correct answer is C .
• Question 355: The following are the scores of ten students in a test of 20 marks: 15, 16, 17, 13, 16, 8, 5, 16, 19, 17. What is the modal? Options:
  A) 13
  B) 15
  C) 16
  D) 19
  Show Answer
  The correct answer is C .
• Question 356: Which of the following is true of an electrical charge? Options:
  A) positive charge means deficit electrons
  B) negative charge means excess of electrons
  C) electric current means movement of electrons
  D) all of the above
  E) A and B only
  Show Answer
  The correct answer is D .
• Question 357: A mass of a liquid at 30^oC is mixed with a mass of the same liquid at 70^oC and the temperature of the mixture is 45^oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid. Options:
  A) 3 : 5
  B) 5 : 3
  C) 3 : 7
  D) 7 : 3
  Show Answer
  The correct answer is B .
• Question 358: A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10^-6K^-1? Options:
  A) 2.0036m
  B) 2.0018cm
  C) 2.1800
  D) 2.0360m
  Show Answer
  The correct answer is A .
• Question 359:

  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 360:

  If an object just begins to slide on a surface inclined at 30ºto the horizontal,the coefficient of friction is?

  Options:
  A) √3
  B) $\frac{\surd 3}{2}$
  C) $\frac{1}{\surd 2}$
  D) $\frac{1}{\surd 3}$
  Show Answer
  The correct answer is D .