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 871: Calculate the magnitude of the force due to a magnetic field of 0.40T on an electron moving perpendicular to the field with a speed of 4.00 × 106ms^-1 (e 1.60 × 10^-19C] Options:
  A) 6.40 × ^-10
  B) 6.40× 10^-13N
  C) 2.56 × 10^-13N
  D) 1.60 × 10^-12N
  E) 2.30 × 10^-11N
  Show Answer
  The correct answer is C .
• Question 872: A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen? Options:
  A) 0.05m
  B) 0.15m
  C) 0.30m
  D) 1.00m
  Show Answer
  The correct answer is A .
• Question 873: What precaution should a manufacturer take to ensure that energy loss in a transformer is minimized? Options:
  A) the winding of the transformer should be made of high resistance wire
  B) the core should be made of thin sheets of metal
  C) no magnetic material should be used to make the core
  D) the flux linking the primary with the secondary coils should be minimum
  Show Answer
  The correct answer is B .
• Question 874:

  The statements below were made by some students describing what happened during the determination of the melting point of solids.

  I. the temperature of the solid was solid until melting started

  Ii. the temperature of the solid rose until melting started

  Iii. during melting, the temperature was rising

  Iv. during melting, the temperature was constant

  V. the temperature continued to rise after all the solid had melted

  Vi. the temperature stopped rising after all the solid had melted. Which of the following gives correct statements in the right order?

  Options:
  A) ii, iv, and v
  B) ii, iii and vi
  C) i, iii and vi
  D) i, iii and v
  E) i, iv and v
  Show Answer
  The correct answer is A .
• Question 875: Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is Options:
  A) 23.9°
  B) 26.6°
  C) 29.5°
  D) 60.0°
  E) 63.4°
  Show Answer
  The correct answer is B .
• Question 876: An object placed at the bottom of a well full of clear water appears closer to the surface due to? Options:
  A) diffraction
  B) reflection
  C) refraction
  D) polarization
  Show Answer
  The correct answer is C .
• Question 877: A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms^-1. The recoil speed of the machine gun is Options:
  A) 0.5 msec^-1
  B) 1.5 msec^-1
  C) 1 msec^-1
  D) 2 msec^-1
  E) 4 msec^-1
  Show Answer
  The correct answer is C .
• Question 878: 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 .
• Question 879:

  Shadows and eclipses result from the

  Options:
  A) refraction of light
  B) reflection of light
  C) defraction of light
  D) rectilinear propagation of light
  Show Answer
  The correct answer is D .
• Question 880: The heat produced in a conductor carrying an electric current is Options:
  A) inversely proportional to the current and the resistance
  B) directly proportional to the current, resistance and the time
  C) inversely proportional to of the resistance, current and the time
  D) directly proportional to the square of the current, the resistance and the time
  Show Answer
  The correct answer is D .