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 1531: Which of the following correctly explain(s) why a green leaf appears green in bright day light? i. it absorbs only the green component of sunlight. ii. it absorbs all colour of sunlight except green. iii. it reflects only the green component of sunlight. Options:
  A) i only
  B) ii only
  C) i and iii only
  D) ii and iii only
  Show Answer
  The correct answer is D .
• Question 1532: A man wears convex lens glasses of focal length 40cm in order to correct his eye defect. instead of the optimum 25cm, his least distance of distinct vision is Options:
  A) 14cm
  B) 28cm
  C) 75cm
  D) 150cm
  Show Answer
  The correct answer is D .
• Question 1533:

  A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is

  Options:
  A) 5 volts
  B) 10 volts
  C) 15 volts
  D) 20 volts
  Show Answer
  The correct answer is B .
• Question 1534: A cell has an open circuit voltage V₁ and a closed circuit voltage V₂ when a current is flowing through it. Therefore, the internal resistance of the cell is Options:
  A) $\frac{V_2}{I}$
  B) $\frac{V_1}{I}$
  C) $\frac{(V_1+V_2)}{I}$
  D) $\frac{(V_1-V_2)}{I}$
  E) $\frac{(V_2-V_1)}{I}$
  Show Answer
  The correct answer is E .
• Question 1535: An equipment whose power is 1500W and resistance is 375 ohms would draw a current of Options:
  A) 0.10A
  B) 2.00A
  C) 4.00A
  D) 77.5A
  Show Answer
  The correct answer is B .
• Question 1536:

  A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At what angle is the ray reflected?

  Options:
  A) 180${}^o$
  B) 90${}^o$
  C) 0${}^o$
  D) 60${}^o$
  Show Answer
  The correct answer is C .
• Question 1537: Which of the following is true of the loudness of sound? It Options:
  A) depends on the square of the amplitude of the vibrating body
  B) is proportional to the distance of the observer from the source of the sound
  C) is greatest in vacuum
  D) is dependent in vacuum
  Show Answer
  The correct answer is A .
• Question 1538:

  Calculate the heat energy required to vaporize 50g of water initially at 80ºCif the specific heat capacity of water is 4.23jg${}^{-1}$k${}^{-1}$ (specific latent heat of vaporization of water is 2260jg${}^{-1}$

  Options:
  A) 530000J
  B) 23200J
  C) 17200J
  D) 130000J
  Show Answer
  The correct answer is D .
• Question 1539:

  Two metals P and Q 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 their

  Length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is

  Options:
  A) 1:2
  B) 2:1
  C) 8:9
  D) 9:8
  Show Answer
  The correct answer is A .
• Question 1540:

  The inner diameter of a test tube can be measured accurately using a?

  Options:
  A) micrometer screw gauge
  B) pair of dividers
  C) meter rule
  D) pair of vernier calipers
  Show Answer
  The correct answer is D .