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 1671: When vibration occurs in air column, the distance between a node and an antinode is equal to Options:
  A) one-quarter of the wavelength
  B) one-hall of the wavelength
  C) the wave length
  D) twice the wavelength
  E) four-times the wavelength
  Show Answer
  The correct answer is A .
• Question 1672: A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms^-1 to 40ms^-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms^-1] Options:
  A) 15N
  B) 20N
  C) 35N
  D) 45N
  Show Answer
  The correct answer is C .
• Question 1673: What volume of alcohol with a density of 8.4 x 10²kgm^-3 will have the same mass as 4.2m³of petrol whose density is 7.2 x 10²kgm^-3? Options:
  A) 14m³
  B) 3.6m³
  C) 4.9m³
  D) 5.0m³
  E) 5.8m³
  Show Answer
  The correct answer is B .
• Question 1674:

  

  The diagram above shows the prism arrangement in a

  Options:
  A) Microscope
  B) tereoscope
  C) projector
  D) periscope
  E) gyroscope
  Show Answer
  The correct answer is D .
• Question 1675: The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine? Options:
  A) 20N
  B) 30N
  C) 40N
  D) 50N
  Show Answer
  The correct answer is C .
• Question 1676: If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to Options:
  A) friction
  B) viscosity
  C) surface tension
  D) evaporation
  Show Answer
  The correct answer is C .
• Question 1677: A sonometer wire of length 100cm under a tension of 10N, has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is Options:
  A) 5.1N
  B) 7.1N
  C) 14.0N
  D) 19.6N
  Show Answer
  The correct answer is D .
• Question 1678: A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is Options:
  A) 25%
  B) 33%
  C) 50%
  D) 75%
  Show Answer
  The correct answer is D .
• Question 1679: For correcting long sight defects in the human eye we require a Options:
  A) converging lens
  B) diverging lens
  C) microscope
  D) periscope
  E) plain glass sheet
  Show Answer
  The correct answer is A .
• Question 1680:

  The relationship between the coefficient of linear expansion $\alpha$ and volumetric expansion ($\gamma$) is-----------------

  Options:
  A) $\gamma$ = ${\alpha }^{-3}$
  B) $\gamma$ = $\alpha$
  C) 3$\alpha$
  D) $\gamma$ = ${\alpha }^3$
  Show Answer
  The correct answer is C .