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 971: water is a poor thermometric liquid because it Options:
  A) is opaque
  B) is a poor conductor
  C) wets glass
  D) has low vapour pressure
  Show Answer
  The correct answer is B .
• Question 972: The function of the system of granulated carbon mixed with manganese (IV) oxide in a Letanche cell is to Options:
  A) increase the e.m.f. of the cell to 2.0V
  B) prevent local action in the cell
  C) prevent polarisation in the cell
  D) make the cell black and hence a good radiator
  Show Answer
  The correct answer is C .
• Question 973: A man weight 800N climbs up a stairs to height of 15m in 12.5s. What is the man''s average power output? Options:
  A) 667W
  B) 810W
  C) 960W
  D) 15000W
  Show Answer
  The correct answer is C .
• Question 974: When an alternating current given by I = 10sin (120π)t passes through a 12Ω resistor, the power dissipated in the resistor is Options:
  A) 1200W
  B) 600W
  C) 120W
  D) 30W
  Show Answer
  The correct answer is A .
• Question 975: Electrical appliances at home are normally earthed so that Options:
  A) the appliances are maintained at a lower p.d than the earth
  B) both the a.c and d.c sources can be used
  C) a person touching the appliances is safe from electric shock
  D) the appliances are maintained at a higher p.d than the earth
  Show Answer
  The correct answer is C .
• Question 976: Which of the following is a vector? Options:
  A) Electric charge
  B) Electric field
  C) Electrical potential difference
  D) Electrical capacitance
  Show Answer
  The correct answer is B .
• Question 977: The sound from a source travelled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms^-1 the depth of the sea is Options:
  A) 6000m
  B) 3000m
  C) 1500m
  D) 375m
  Show Answer
  The correct answer is B .
• Question 978: The physical quantity that has the same dimensions as impulse is Options:
  A) energy
  B) momentum
  C) surface tension
  D) pressure
  Show Answer
  The correct answer is B .
• Question 979: A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill? Options:
  A) 528m
  B) 66m
  C) 136m
  D) 264m
  Show Answer
  The correct answer is C .
• Question 980: Particles of mass 10^-2kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad^-1. If the radius of the blade is 0.2m, the centripetal force is Options:
  A) 2 N
  B) 20 N
  C) 200 N
  D) 400 N
  Show Answer
  The correct answer is B .