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 461: X rays can be used in the study of crystal structure because they Options:
  A) have a very long-reaching wavelength
  B) have extremely short wavelength
  C) are invisible
  D) are very fast
  Show Answer
  The correct answer is B .
• Question 462:

  A certain manufacturer wishes to make an n-type semiconductor. Which materials would he select for doping?

  Options:
  A) boron and antimony
  B) aluminium and antimony
  C) aluminium and indium
  D) arsenic and antimony
  Show Answer
  The correct answer is D .
• Question 463: An electric iron rated 250 V has a coil of resistance 125Ω. What is the cost of using it for I hour at 10k per kWh? Options:
  A) 1.25k
  B) 2.50k
  C) 5.00k
  D) 10.00k
  E) 20.00k
  Show Answer
  The correct answer is C .
• Question 464: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 465: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 466: Find the standard deviation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5 Options:
  A) 2
  B) 3
  C) √10
  D) √11
  Show Answer
  The correct answer is C .
• Question 467:

  

  In the diagram above, what would happen to the current I, if another resistor, R₂, is connected in parallel to R₁?

  Options:
  A) It will increase because the equivalent resistance will increase
  B) It will decrease if R₂ is greater than R₁
  C) It will increase because the effective resistance will decrease
  D) It will decrease if R₂ is less than R₁
  Show Answer
  The correct answer is C .
• Question 468: If the decay constant of a radioactive substance is 0.231s¹, the half-life is? Options:
  A) 3.00 s
  B) 0.12 s
  C) 0.33 s
  D) 1.50 s
  Show Answer
  The correct answer is A .
• Question 469:

  

  The figure above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

  Options:
  A) Q
  B) R
  C) A point between P and R
  D) A point between R and S
  Show Answer
  The correct answer is D .
• Question 470:

  I. Low pressure.
  II. High pressure.
  III. High p.d.
  IV. Low p.d.

  Which combination of the above is true of the conduction of electricity through gases?

  Options:
  A) I and IV only
  B) I and III only
  C) II and IV only
  D) II and III only
  Show Answer
  The correct answer is B .