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 1651: The velocity of a sound wave at 27^oC is 360ms^-1. Its velocity at 127^oC is Options:
  A) 120√3 ms^-1
  B) 240 ms^-1
  C) 240√3 ms^-1
  D) 720√3 ms^-1
  Show Answer
  The correct answer is C .
• Question 1652: I. reproducibility II. SensibilityIII. High terminal capacityiv. High accuracy The quantities of a good thermometer include? Options:
  A) I, II and IV only
  B) I, III and IV only
  C) I, II and III only
  D) II, III and IV only
  Show Answer
  The correct answer is D .
• Question 1653:

  A solid weighs10.00N in air,6N when forcefully immersed in water, and 7.0N when fully immersed in a liquid, X. Calculate the relative density of the liquid X.

  Options:
  A) $\frac{5}{3}$
  B) $\frac{4}{3}$
  C) $\frac{3}{4}$
  D) $\frac{7}{10}$
  Show Answer
  The correct answer is C .
• Question 1654: A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is Options:
  A) 100ms^-1
  B) 120ms^-1
  C) 200ms^-1
  D) 250ms^-1
  Show Answer
  The correct answer is C .
• Question 1655: Transistors are used for the Options:
  A) rectification of signals
  B) conversion of a.c to d.c
  C) amplification of signals
  D) conversion of d.c to a.c
  Show Answer
  The correct answer is C .
• Question 1656: Which of the following instruments helps to maintain the correct humidity and temperature of a building? Options:
  A) A compressor
  B) A refrigerator
  C) Air blower
  D) Air conditioner
  Show Answer
  The correct answer is D .
• Question 1657: A radioactive substance has a half-life of 20 days what fraction the original radiation nuclei will remain after 80 days? Options:
  A) (1)/32
  B) (1)/16
  C) (1)/ 8
  D) (1)/4
  Show Answer
  The correct answer is B .
• Question 1658: What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh? Options:
  A) N0.65
  B) N0.13
  C) N3.90
  D) N39.00
  E) N234.00
  Show Answer
  The correct answer is B .
• Question 1659: At what frequency would a 10H inductor have a reactance of 2000Ω? Options:
  A) π/200Hz
  B) π/100Hz
  C) 100/πHz
  D) 100πHz
  Show Answer
  The correct answer is C .
• Question 1660:

  Which of the following is a type of incandescent light source?

  Options:
  A) Fluorescent lamp
  B) LED lamp
  C) Tungsten filament lamp
  D) Neon lamp
  Show Answer
  The correct answer is C .