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 2461: A gun of mass 2.0kg fires a bullet of mass 16 x 10 ^-2kg due East. If the bullet leaves the nozzle of the gun with a velocity of 150ms^-1, what is the recoil velocity of the gun? Options:
  A) 150ms^-1 due West
  B) 1.2 x 10^-4ms^-1 due West
  C) 1.2ms^-1 due West
  D) 1.2ms^-1 due East
  E) 150ms^-1 due East
  Show Answer
  The correct answer is C .
• Question 2462: A tap supplies water at 25^oC while another supplies water at 75^oC. If a man wishes to bathe with water at 40^oC, the ratio of the mass of cold water to the mass of hot water required is Options:
  A) 1 : 3
  B) 15 : 8
  C) 7 : 3
  D) 3 : 1
  Show Answer
  The correct answer is C .
• Question 2463:

  

  In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P₁ and P₂ dissipated by R₁ and R₂

  Options:
  A) ^R₂/_R1
  B) ^R₁/_R2
  C) ^R₁+R₂/_R1
  D) ^R₁+R₂/_R2
  Show Answer
  The correct answer is A .
• Question 2464:

  

  In the figure above, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms^-2]

  Options:
  A) 9N
  B) 18N
  C) 20N
  D) 200N
  Show Answer
  The correct answer is D .
• Question 2465: A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer? Options:
  A) 2mA
  B) 10mA
  C) 20mA
  D) 25mA
  Show Answer
  The correct answer is C .
• Question 2466:

  

  Three cells each of e.m.f 1.5 V and internal resistance 2.5Ω are connected as shown in the diagram above. Find the net e.m.f and the internal resistance

  Options:
  A) 1.5V, 7.50Ω
  B) 1,5V, 0.83Ω
  C) 4.5V, 7.50Ω
  D) 4.5V, 0.83Ω
  Show Answer
  The correct answer is B .
• Question 2467: If two parallel conductors carry currents flowing in the same direction, the conducts will Options:
  A) attract each other
  B) repel each other
  C) both move in the same direction
  D) have no effect on each other
  Show Answer
  The correct answer is A .
• Question 2468:

  The slope of the straight line displacement-time graph indicates?

  Options:
  A) distance traveled
  B) uniform velocity
  C) uniform acceleration
  D) uniform speed
  Show Answer
  The correct answer is B .
• Question 2469: what is likely to happen if the glass of a thermometer expands more upon heating than the liquid inside? Options:
  A) the glass will break
  B) the glass will shrink
  C) the liquid will rise up in the stem
  D) the liquid will go down in the stem
  Show Answer
  The correct answer is D .
• Question 2470:

  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 .