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 311: A magnetic field is said to exist at a point if a force is Options:
  A) exerted on a stationary charge at the point
  B) exerted on a moving charge at the point
  C) deflected at the point
  D) strengthened at the point
  Show Answer
  The correct answer is B .
• Question 312:

  A cell gives a current of 0.15A through a resistance of 8$\mathrm{\Omega }$ and 0.3A. When the resistance is changed to 3$\mathrm{\Omega }$ the internal resistance of the cell is

  Options:
  A) 0.05$\mathrm{\Omega }$
  B) 1.00$\mathrm{\Omega }$
  C) 1.50$\mathrm{\Omega }$
  D) 2.00$\mathrm{\Omega }$
  E) 2.50$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 313:

  A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

  [Take g = 10 ms${}^{-2}$]

  Options:
  A) $2.4\times {10}^{10}(N{m}^{-2})$
  B) $1.5\times {10}^{10}(N{m}^{-2})$
  C) $2.4\times {10}^9(N{m}^{-2})$
  D) $1.3\times {10}^{10}(N{m}^{-2})$
  Show Answer
  The correct answer is A .
• Question 314: Body floats in fluid when its ………………… Options:
  A) Displaces its own volume of the liquid (fluid)
  B) Displaces its own mass of the fluid
  C) Displace its own density of the fluid
  D) Is no longer subjected to gravity
  Show Answer
  The correct answer is B .
• Question 315: A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the Options:
  A) charges generated by friction in the tanker are conducted to the earth
  B) chain vibrates in resonance with the tanker’s engine
  C) heat generated by friction in the engine is conducted to the earth
  D) petrol tanker is balanced on the road
  E) tanker does not exceed a certain speed limit
  Show Answer
  The correct answer is A .
• Question 316: If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to Options:
  A) friction
  B) viscosity
  C) surface tension
  D) evaporation
  Show Answer
  The correct answer is C .
• Question 317: Neutron were discovered by Options:
  A) J.J. Thompson
  B) James Chadwick
  C) Michael faraday
  D) Dalton
  Show Answer
  The correct answer is B .
• Question 318: A short response to time is obtained in liquid-in-glass thermometer when the Options:
  A) bulb is large and thick-walled
  B) stem is long and thin
  C) bulb is small and thicked-walled
  D) liquid is of high density and the bore is large
  E) bulb is thin-walled and the liquid is a good conductor of heat
  Show Answer
  The correct answer is E .
• Question 319: A bullet fired at a wooden block of thickness 0.15m manages to penetrate the block. If the mass of the bullet is 0.025kg and the average resisting force of the wood is 7.5 x 10³N, calculate the speed of the bullet just before it hits the wooden block. Options:
  A) 450ms^-1
  B) 400ms^-1
  C) 300ms^-1
  D) 250ms^-1
  Show Answer
  The correct answer is C .
• Question 320: A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object? Options:
  A) 2.0cm
  B) 4.0 cm
  C) 6.7cm
  D) 20.0cm
  E) 25.0cm
  Show Answer
  The correct answer is B .