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 1171: Heat losses to the surrounding is possible through the following except Options:
  A) Conduction
  B) Convection
  C) Radiation
  D) Expansion
  Show Answer
  The correct answer is D .
• Question 1172: A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body? Options:
  A) 8.7N
  B) 37.0N
  C) 87.0N
  D) 13.0N
  Show Answer
  The correct answer is B .
• Question 1173:

  The following are some units

  I. Ns

  II. Non

  III. Nm${}^{-2}$

  IV. J°K${}^{-1}$

  V. JKj${}^{-1}$

  What are the units of latent heat?

  Options:
  A) I
  B) II
  C) III
  D) V
  Show Answer
  The correct answer is D .
• Question 1174:

  I. Force (N)

  II.Torque (NM)

  III. Current (A)

  IV. Power (W)

  Which of the above are the correct S. I: units of the quantities indicated?

  Options:
  A) I and II only
  B) I and III only
  C) I, II and III only
  D) I, III and IV only
  Show Answer
  The correct answer is D .
• Question 1175: When a transformer has more secondary windings than primary windings, it Options:
  A) has a smaller secondary current
  B) has a greater power output
  C) is a step-down transformer
  D) increases the total energy output
  Show Answer
  The correct answer is C .
• Question 1176: Power supply is transmitted at a very high voltage and low current in order to Options:
  A) make pass through the trasformers
  B) increase the power supply
  C) make it travel fast
  D) prevent overheating of the coil
  Show Answer
  The correct answer is D .
• Question 1177:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 1178: A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio. Options:
  A) 0.53
  B) 0.83
  C) 1.20
  D) 1.50
  E) 1.88
  Show Answer
  The correct answer is E .
• Question 1179: An object of height 4cm is placed in front of a cuboid pinhole camera of size 6 cm. if the image formed is 2 cm high, how far is the object from the pinhole? Options:
  A) 3.0 cm
  B) 8.0 cm
  C) 12.0 cm
  D) 16.0 cm
  Show Answer
  The correct answer is C .
• Question 1180: A mirror of weight 75N is hung by a cord from a hook on the wall. If the cord makes an angle of 30^o with horizontal, the tension in the cord is Options:
  A) 100N
  B) 1500N
  C) 250N
  D) 150N
  Show Answer
  The correct answer is D .