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 641: Electricity is supplied to a school along a cable of total resistance 0.5$\mathrm{\Omega }$ with the maximum current drawn from the mains as 100A. The maximum energy dissipated as heat for 1 hr is Options:
  A) 3.6 x 10³J
  B) 5.0 x 10³J
  C) 3.0 x 10⁵J
  D) 1.8 x 10⁷J
  Show Answer
  The correct answer is D .
• Question 642:

  A given mass of gas has a pressure of 80 Nm${}^{-2}$ at a temperature of 47 C. If the temperature is reduced to 27 C with volume remaining constant, the new pressure is?

  Options:
  A) 46.0 Nm${}^{-2}$
  B) 75.0 Nm${}^{-2}$
  C) 80.0 Nm${}^{-2}$
  D) 85.3 Nm${}^{-2}$
  Show Answer
  The correct answer is B .
• Question 643:

  The sensitivity of a thermometer is

  Options:
  A) All of the above
  B) how quickly a temperature change can be detected
  C) the difference between the maximum and the minimum temperature
  D) the smallest temperature change that can be detected or measured
  Show Answer
  The correct answer is D .
• Question 644:

  When the temperature of a liquid increases,its surface tension

  Options:
  A) decreases
  B) increases
  C) remains constant
  D) increases then decreases
  Show Answer
  The correct answer is A .
• Question 645:

  A piano wire 50 cm long has a total mass of 10 g and its stretched with a tension of 800 N. Find the frequency of the wire when it sounds its third overtone note.

  Options:
  A) 800 Hz
  B) 600 Hz
  C) 400 Hz
  D) 200 Hz
  Show Answer
  The correct answer is A .
• Question 646:

  

  The figure above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y

  Options:
  A) 1/3
  B) 2/3
  C) 3
  D) 6
  Show Answer
  The correct answer is C .
• Question 647: When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depend on the Options:
  A) intensity of the radiation
  B) source of the radiation
  C) wavelength of the radiation
  D) detection device of the electron
  Show Answer
  The correct answer is A .
• Question 648:

  The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

  Options:
  A) angle of variation is zero
  B) magnetic declination is 90
  C) angle of dip is zero
  D) horizontal component at the Earth's field is zero
  Show Answer
  The correct answer is C .
• Question 649:

  

  The phase difference between waves P and q in the diagram above is

  Options:
  A) 2π
  B) π
  C) ^π/₄
  D) ^π/₂
  Show Answer
  The correct answer is D .
• Question 650: A slight loading of a tuning fork has the effect of Options:
  A) decreasing its amplitude
  B) increasing its amplitude
  C) decreasing its frequency
  D) increasing its frequency
  Show Answer
  The correct answer is B .