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 681: A load of 5N gives an extension of 0.56cm in a wire which obeys Hooke's law. What is the extension caused by a load of 20N? Options:
  A) 1.12cm
  B) 2.14cm
  C) 2.24cm
  D) 2.52cm
  Show Answer
  The correct answer is C .
• Question 682: If two charged plates are maintained at a potential difference of 3 kv, the work done in taking a charge of 600µc across the field is Options:
  A) 0.8j
  B) 1.8j
  C) 9.0j
  D) 18.0j
  Show Answer
  The correct answer is B .
• Question 683: Three similar cells each of e.m.f 2 v and internal resistance 2Ω are connected in parallel, the total e.m.f and total internal resistance are respectively Options:
  A) 6 v, 6.0Ω
  B) 2 v, 0.7Ω
  C) 2 v, 6.0Ω
  D) 6 v, 0.7Ω
  Show Answer
  The correct answer is B .
• Question 684: When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The ratio of the specific heat capacity of P to Q is Options:
  A) 1 : 4
  B) 4 : 1
  C) 1 : 1
  D) 2 : 1
  Show Answer
  The correct answer is C .
• Question 685:

  

  A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be

  I.γ-rays β-rays
  II. x-rays β-rays
  III. γ-rays x-rays
  IV. x-rays x-rays

  Options:
  A) I only
  B) III only
  C) I and II
  D) III and IV
  Show Answer
  The correct answer is A .
• Question 686: A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity is 10ms^-2, the power expended is Options:
  A) 100W
  B) 200W
  C) 250W
  D) 400W
  E) 500W
  Show Answer
  The correct answer is E .
• Question 687: If the distance from a point source of sound is doubled, by what factor does the intensity decrease? Options:
  A) 4.00
  B) 2.00
  C) 0.50
  D) 0.25
  Show Answer
  The correct answer is A .
• Question 688: If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys Options:
  A) Graham's Law
  B) Boyle's Law
  C) Pressure law
  D) Charles Law
  E) No Correct Option
  Show Answer
  The correct answer is B .
• Question 689:

  

  The value of the series resistor required to convert the above galvanometer into a voltmeter with a full range deflection of 15V is

  Options:
  A) 985 ohms
  B) 990 ohms
  C) 995 ohms
  D) 1000 ohms
  E) 1005 ohms
  Show Answer
  The correct answer is C .
• Question 690:

  

  In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

  Options:
  A) north and south
  B) south and south
  C) north and north
  D) south and north
  Show Answer
  The correct answer is C .