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 481: A platinum resistance thermometer wire has a resistance of 5 ohms at 0^oC and 5.5 ohms at 100^oC. Calculate the temperature of the wire when the resistance is 5.2 ohms Options:
  A) 80^oC
  B) 60^oC
  C) 40^oC
  D) 10^oC
  Show Answer
  The correct answer is C .
• Question 482: The extension in a spring when 5g wt was hung from it was 0.56cm. If Hooke's law is obeyed, What is the extension caused by a load of 20g wt? Options:
  A) 1.12m
  B) 2.14cm
  C) 2.52cm
  D) 2.80cm
  E) 2.24cm
  Show Answer
  The correct answer is E .
• Question 483: What will happen to the pressure of a gas if its temperature is reduced to -273^oC? Options:
  A) It will decrease
  B) it will drop to zero
  C) It will increase
  D) It will remain constant
  Show Answer
  The correct answer is B .
• Question 484: A temperature scale has a lower fixed point of 40mm and a upper fixed point of 200mm. What is the reading on this scale when a thermometer reads 60^oC? Options:
  A) 33.3mm
  B) 36.0mm
  C) 96.0mm
  D) 136.0mm
  Show Answer
  The correct answer is D .
• Question 485: The speed of light in vacuum is 3.0 x 10⁸ms^-1. If the refractive index of a transparent liquid is $\frac{4}{3}$, then the speed of light in the liquid is Options:
  A) 0.44 x 10 ⁸ms^-1
  B) 2.25 x 10 ⁸ms^-1
  C) 3.0 x 10 ⁸ms^-1
  D) 4.0 x 10 ⁸ms^-1
  E) 4.33 x 10 ⁸ms^-1
  Show Answer
  The correct answer is B .
• Question 486: What happens when three coplanar non-parallel forces are in equilibrium? Options:
  A) Their lines of action are parallel.
  B) They are represented in magnitude only
  C) They are represented in direction only
  D) Their lines of action meet at a point
  Show Answer
  The correct answer is D .
• Question 487: The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [$\pi$ = 3.142] Options:
  A) 50.0Hz
  B) 100.0Hz
  C) 311.0Hz
  D) 314.2Hz
  Show Answer
  The correct answer is A .
• Question 488: In order to convert a galvanometer into an ammeter Options:
  A) a low resistance shunt is connected in parallel
  B) a low resistance shunt is connected in series
  C) a medium resistance shunt is connected in series
  D) a high resistance shunt is connected in parallel
  E) a high resistance shunt is connected in series
  Show Answer
  The correct answer is A .
• Question 489:

  A cannon is fired from town X, after how long is the sound heard at a town Y 4.95 km away?

  [velocity of sound in the air = 330 ms^-1]

  Options:
  A) 30 s
  B) 10 s
  C) 10 s
  D) 15 s
  Show Answer
  The correct answer is D .
• Question 490: The maximum power transfer occur in a cell when the external resistance is Options:
  A) Twice the internal resistance of the cell
  B) The same as the internal resistance of the cell
  C) Greater than the internal resistance of the cell
  D) Less than the internal resistance of the cell
  Show Answer
  The correct answer is B .