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 1521: In homes, electrical appliances and lamps are connected in parallel because Options:
  A) Parallel connections do not heat up the wires
  B) series connections use high voltage
  C) less current will be used
  D) less voltage will be used
  Show Answer
  The correct answer is C .
• Question 1522: If the capacitance of an capacitor is C = (εA)/d, which of the following parameters is varied when a variable capacitors is used for tuning radio sets? Options:
  A) constant (ε) and area
  B) area and distance.
  C) constant (ε) only
  D) distance only
  Show Answer
  The correct answer is B .
• Question 1523: Which of the following statements is (are) NOT true about the emission of the photoelectrons from metallic surfaces? i. all metallic surfaces emits the same number of photoelectrons in a given light ii. most metallic surfaces emit the same number of photoelectrons in visible and infra-red light iii. a metallic surface emits photoelectrons only if the frequency of the incident light is higher than its own characteristics threshold frequency Options:
  A) i only
  B) ii only
  C) i and ii
  D) ii and iii
  E) iii only
  Show Answer
  The correct answer is E .
• Question 1524:

  The velocity y of a particle in a time t is given by the equation

  Y = 10 + 2t²

  Find the instantaneous acceleration after 5 seconds

  Options:
  A) 60 ms^-2
  B) 20 ms^-2
  C) 15 ms^-2
  D) 10 ms^-2
  Show Answer
  The correct answer is B .
• Question 1525: When the volume of a given mass of gas is halved and its temperature doubled, the pressure Options:
  A) remains constant
  B) increases by a factor of 4
  C) increases by a factor of 3
  D) decreases by a factor of 4
  Show Answer
  The correct answer is B .
• Question 1526: 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 1527: Which of the following statements is NOT true of $\gamma$-rays? Options:
  A) $\gamma$-rays belong to the electromagnetic spectrum
  B) $\gamma$-rays do not carry an electron charge
  C) $\gamma$-rays obey the inverse cube law in air
  D) the thickness of aluminium which stops b-particule has a negligible effect on $\gamma$-radiation
  E) the difference between $\gamma$-rays and X-rays is that $\gamma$-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms
  Show Answer
  The correct answer is C .
• Question 1528: The inner diameter of a test tube can be measured accurately using a Options:
  A) micrometer screw guage
  B) pair of dividers
  C) metre rule
  D) pair of vernier calipers
  Show Answer
  The correct answer is D .
• Question 1529: The particle and wave nature of matter are demonstrated in the equation Options:
  A) λ = ^hc/_E
  B) λ = ^h/_P
  C) λ = ^c/_f
  D) λ = 2 d sin θ
  Show Answer
  The correct answer is B .
• Question 1530: How long does it take a 750W heater to raise the temperature of 1kg of water from 20^oC to 50^oC [specific heat capacity of water = 4200Jkg^-1K^-1] Options:
  A) 84s
  B) 112s
  C) 168s
  D) 280s
  Show Answer
  The correct answer is C .