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 51:

  When a girl moves towards a plane mirror at a speed of 4.0m/s, the distance between the girl and her image reduces a speed of

  Options:
  A) 2 m/s
  B) 4 m/s
  C) 8 m/s
  D) 12 m/s
  Show Answer
  The correct answer is C .
• Question 52: What is the angle of dip at the magnetic equator Options:
  A) ${45}^{\circ }$
  B) $0^{\circ }$
  C) ${90}^{\circ }$
  D) ${180}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 53: If the decay constant of a radioactive substance is 0.231s¹, the half-life is? Options:
  A) 3.00 s
  B) 0.12 s
  C) 0.33 s
  D) 1.50 s
  Show Answer
  The correct answer is A .
• Question 54: When a ball rolls on a smooth level ground, the motion of its center is Options:
  A) translational
  B) oscillatory
  C) random
  D) rotational
  Show Answer
  The correct answer is A .
• Question 55: Which of the following conditions are necessary and sufficient for total internal reflection to take place at the boundary between two optical media? i. light is passing from optically denser medium to optically less dense medium. ii. light is passing from optically less dense medium to optically denser medium. iii. angle of incidence is greater. iv. angle of incidence is lesser Options:
  A) i and ii only
  B) ii and iii only
  C) ii and iv only
  D) i and iii only
  E) ii and iv only
  Show Answer
  The correct answer is D .
• Question 56: An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is Options:
  A) 20cm
  B) 45cm
  C) 54cm
  D) 63cm
  E) 70cm
  Show Answer
  The correct answer is A .
• Question 57: When an astronomical telescope is in normal adjustment, the focal length of the objective lens is 50cm and that of the eyepiece is 2.5om. What is the distance between the lenses? Options:
  A) 20.0cm
  B) 47.5cm
  C) 50.0cm
  D) 52.5cm
  E) 125.0cm.
  Show Answer
  The correct answer is D .
• Question 58: Heat was supplied to a block of ice at 0^oC until half of it melted. Which of the following statements is true? Options:
  A) the temperature rises and the ice expand
  B) the temperature remains constant and the volume of the ice decreases
  C) the ice gives out heat as it melts and the temperature decreases
  D) the mass remains constant and the temperature increases
  E) the temperature decreases because some heat is lost
  Show Answer
  The correct answer is B .
• Question 59:

  

  A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be

  I.γ-rays β-rays
  II. x-rays β-rays
  III. γ-rays x-rays
  IV. x-rays x-rays

  Options:
  A) I only
  B) III only
  C) I and II
  D) III and IV
  Show Answer
  The correct answer is A .
• Question 60: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .