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 321: The sign of the change on a charged glass rod may be determined with Options:
  A) a charged electroscope
  B) an uncharged electroscope
  C) a galvanometer
  D) an electrometer
  Show Answer
  The correct answer is A .
• Question 322: Which of the following metals will provide the greatest shield against ionizing radiation Options:
  A) Iron
  B) Manganese
  C) Alminium
  D) Lead
  Show Answer
  The correct answer is D .
• Question 323:

  A wire of length 10m is cooled from 50^oC to 10^oC. Calculate the decrease in the length of the wire. [c = 3 x 10^-5K^-1]

  Options:
  A) 1.8 x 10^-4m
  B) 1.5 x 10^-4m
  C) 1.5 x 10^-3m
  D) 1.8 x 10^-3m
  Show Answer
  The correct answer is C .
• Question 324: The internationally agreed system of units(SI) for physical measurements are Options:
  A) Ib, ft, sec
  B) g, m, sec
  C) kg, m, sec
  D) cm, g, sec
  E) kg, cm, sec
  Show Answer
  The correct answer is C .
• Question 325:

  Convex mirrors are used as driving mirrors because images formed are

  Options:
  A) erect, Virtual and diminished
  B) erect, real and diminished
  C) erect, virtual and magnified
  D) inverted, virtual and diminished
  Show Answer
  The correct answer is A .
• Question 326: A mango fruit drops from a branch 10m above the ground, just before hitting the ground its velocity is (g = 10ms^-2) Options:
  A) 10√2ms^-1
  B) 10ms^-1
  C) 100ms^-1
  D) 5√2ms^-1
  E) 200ms^-1
  Show Answer
  The correct answer is A .
• Question 327: The force of repulsion between two point positive charges 5$\mu$C and 8$\mu$C separated at a distance of 0.02 map art is. [$\frac{1}{4\pi {\epsilon }_o}$ = 9 x 10⁹Nm²C^-2] Options:
  A) 1.8 x 10^-10N
  B) 9.0 x 10^-8N
  C) 9.0 x 10²N
  D) 4.5 x 10³N
  Show Answer
  The correct answer is C .
• Question 328: A thin aluminum plate has a surface area of 1500m at 20^oC. What will be its surface area when it is cooled to -20^oC? (Take the linear expansivity of aluminum to be 2.5 x 10^-5k^-1). Options:
  A) 1.503m²
  B) 1.500m²
  C) 1.498m²
  D) 1.497m²
  E) 1.490m²
  Show Answer
  The correct answer is C .
• Question 329: The battery connection that permits current to flow across a p-n junction is called? Options:
  A) reverse baised
  B) forward baised
  C) amplification.
  D) rectification
  Show Answer
  The correct answer is B .
• Question 330:

  

  A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?

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