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 1121:

  A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are

  Options:
  A) 0${}^o$ and 0${}^o$
  B) 60${}^o$ and 60${}^o$
  C) 90${}^o$ and 90${}^o$
  D) 90${}^o$ and 0${}^o$
  Show Answer
  The correct answer is D .
• Question 1122:

  A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the cell is

  Options:
  A) 12.0%
  B) 25.0%
  C) 33.3%
  D) 75.0%
  Show Answer
  The correct answer is C .
• Question 1123: Which of the following statements is correct? The magnetized state of an iron bar can be destroyed completely by Options:
  A) heating the bar to a high temperature
  B) breaking the bar
  C) connecting opposite poles with a small piece of iron
  D) placing the bar inside a strong magnetic field
  E) none of the above
  Show Answer
  The correct answer is A .
• Question 1124: A blacksmith heated a metal whose cubic expansivity is 6.3 x 10^-6K^-1. The areal expansivity is Options:
  A) 2.0 x 10^-6K^-1
  B) 2.1 x 10^-6K^-1
  C) 4.2 x 10^-6K^-1
  D) 6.3 x 10^-6K^-1
  Show Answer
  The correct answer is C .
• Question 1125:

  

  What is the reading of the vernier scale above?

  Options:
  A) 1.88cm
  B) 1.80cm
  C) 1.28cm
  D) 1.97cm
  Show Answer
  The correct answer is A .
• Question 1126: A boy on looking into a mirror observed that his face appeared to have grown bigger. The boy must have been looking at a Options:
  A) convex mirror with his face at the focus
  B) concave mirror with his face between the focus and the mirror
  C) concave mirror with his face at the focus
  D) convex mirror with his face between the focus and the mirror
  Show Answer
  The correct answer is B .
• Question 1127: Light of frequency 6.0 x 10¹⁴ Hz travelling in air is transmitted through glass or refractive index 1.5. Calculate the frequency of the light in the glass Options:
  A) 4.0 x 10¹⁴Hz
  B) 6.0 x 10¹⁴Hz
  C) 7.5 x 10¹⁴Hz
  D) 9.0 x 10¹⁴Hz
  Show Answer
  The correct answer is A .
• Question 1128: An object 0 lies at a distance m in front of concave mirror of focal length f. If m < f, then the final image obtained will be Options:
  A) virtual and diminished
  B) magnified and erect
  C) real and inverted
  D) diminished and erect
  Show Answer
  The correct answer is C .
• Question 1129: Find the work done in moving a 2 C charge between two points X and Y in an electric field if the potential difference is 100 volts Options:
  A) 50J
  B) 100J
  C) 200J
  D) 400J
  Show Answer
  The correct answer is C .
• Question 1130: An object weighs 22 kg in water and 30kg in air. what is the upthrust exerted by the liquid on the object.
  [g = 10 ms²] Options:
  A) 50 N
  B) 520 N
  C) 220 N
  D) 80 N
  Show Answer
  The correct answer is D .