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 881: Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm Options:
  A) $\frac{1}{140}$$\pi$
  B) 14$\pi$
  C) 70$\pi$
  D) 140$\pi$
  Show Answer
  The correct answer is D .
• Question 882: 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 883:

  

  The figure above shows displacement-time graphs for three different motions. which of the following statements is correct

  Options:
  A) graph 2 corresponds to the highest velocity
  B) graph 1 corresponds to zero gravity
  C) graph 3 corresponds to a particle moving in the negative x direction
  D) graph 2 corresponds to a particle moving in the positive x direction
  Show Answer
  The correct answer is D .
• Question 884: The speed of sound in air at sea-level is 340ms^-1 while that of light is 300 000kms^-1. How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightening flash? Options:
  A) 170ms^-1
  B) 340ms^-1
  C) 600ms^-1
  D) 680ms^-1
  Show Answer
  The correct answer is D .
• Question 885:

  Which of the following statements about defects of vision is/are CORRECT?

  I. Fora long sighted person, close objects appear blurred

  II. For a short sighted person, distant objects appear blurred

  III. Short sight is corrected by using a pair of converging lenses

  Options:
  A) I only
  B) II only
  C) I and II only
  D) II and III only
  Show Answer
  The correct answer is C .
• Question 886: Calculate the angle of minimum deviation of a 60^o prism of a refractive index [sin^-10.75 = 49^o] Options:
  A) 38.00^o
  B) 19.47^o
  C) 16.25^o
  D) 49^o
  Show Answer
  The correct answer is A .
• Question 887: A piano wire 0.5m long has a total mass of 0.01kg and is stretched with a tension of 800N. Calculate the frequency of the wire when it sounds its fundamental note Options:
  A) 200Hz
  B) 100Hz
  C) 4Hz
  D) 2Hz
  Show Answer
  The correct answer is A .
• Question 888: Four cells each of e.m.f 1.5V and internal resistance of 4Ω are connected in parallel. What is the effective e.m.f. and internal resistance of the combination? Options:
  A) 6.0V, 16Ω
  B) 6.0V, 1Ω
  C) 1.5V, 4Ω
  D) 1.5V, 1Ω
  Show Answer
  The correct answer is D .
• Question 889: Which of the following is a pure semiconductor? Options:
  A) carbon
  B) silicon
  C) transistor
  D) phosphorus
  Show Answer
  The correct answer is B .
• Question 890: When an ebolite rod is rubbed with fur, it has Options:
  A) no charge at all
  B) a negative charge
  C) a positive charge
  D) negative and positive charges
  Show Answer
  The correct answer is B .