NECO Physics Exam Past Questions and Answers

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 301: J.J. Thomson’s model of the atom was abandoned because Options:
  A) it could not explain the scattering of alpha particles
  B) it did not account for the neutron
  C) it did not account for the size of the atom
  D) it was known as plum-pudding model
  E) the model was not similar to any observable phenomena
  Show Answer
  The correct answer is A.
• Question 302: Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain Options:
  A) pressure is increased
  B) pressure is reduced
  C) the rays of the sun add more heat to the water
  D) the saturation vapour pressure of water is higher than at sea-level
  E) the temperature is lower than at sea-level
  Show Answer
  The correct answer is B.
• Question 303: The volume of a given mass of gas is 40cm³ at 27° C. What is its volume at 90° C if its pressure remains constant? Options:
  A) 32.84cm³
  B) 40.02cm³
  C) 48.40cm³
  D) 57.44cm³
  E) 72.84cm³
  Show Answer
  The correct answer is C.
• Question 304: Which of the following statements is NOT true? Options:
  A) A lead-acid accumulator can deliver a large current because of its very large internal resistance.
  B) A secondary cell can be recharged.
  C) As a lead-acid accumulator is being charged, the density of the acid in it increases.
  D) The chemical action in a primary cell is irreversible.
  E) The conventional current in a circuit rlows from the positive to the negative terminal of the battery.
  Show Answer
  The correct answer is A.
• Question 305: A sheet of white paper viewed through blue glass appears blue because Options:
  A) blue is a primary colour
  B) the glass absorbs all colours except the blue colour
  C) the glass reflects blue colour
  D) the paper reflects blue colour only
  E) white light is easily absorbed by the glass
  Show Answer
  The correct answer is B.
• Question 306: An object is placed 30 cm in front of a concave mirror of focal length 20cm. Calculate the distance between the object and the image. Options:
  A) 90cm
  B) 40cm
  C) 30cm
  D) 20cm
  E) 10cm
  Show Answer
  The correct answer is A.
• Question 307: Which of the following properties is NOT exhibited by sound waves? Options:
  A) Diffraction
  B) interference
  C) Polarisation
  D) Reflection
  E) Refraction
  Show Answer
  The correct answer is C.
• Question 308: An evidence of the wave nature of matter is Options:
  A) Browniam motion
  B) Compton effect
  C) diffraction
  D) diffusion
  E) photo electricity
  Show Answer
  The correct answer is C.
• Question 309: The area under the curve of a velocity time graph represents Options:
  A) acceleration
  B) distance covered
  C) instantaneous speed
  D) time taken
  E) work done
  Show Answer
  The correct answer is B.
• Question 310: A body is launched from the earth’s surface, of radius R, so that it just escapes from the gravitational influence of the earth; If the gravitational constant is G and the mass of the earth is M, what is the escape velocity of the boby. Options:
  A) $\sqrt{2GM}$ ÷ R
  B) $\frac{\sqrt{2GM}}{R}$
  C) $\frac{\sqrt{2G}}{MR}$
  D) $\sqrt{2GMR}$
  E) $\frac{\sqrt{R}}{2GM}$
  Show Answer
  The correct answer is B.