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 371: For a best result using temperature to achieve an accurate measurement, it is best to use Options:
  A) Mercury thermometer
  B) gas thermometer
  C) clinical thermometer
  D) alcohol thermometer
  Show Answer
  The correct answer is B .
• Question 372:

  Calculate the velocity ratio of a screw jack of pitch 0.2cm if the length of the tommy bar is 23cm

  Options:
  A) 230$\pi$
  B) 23$\pi$
  C) 70$\pi$
  D) 140$\pi$
  Show Answer
  The correct answer is A .
• Question 373: If the distance between two stationary charged particle is doubled, the magnitude of the electro-static force between them will be Options:
  A) doubled
  B) halved
  C) a quarter of its former value
  D) unchanged
  E) four times the original value
  Show Answer
  The correct answer is C .
• Question 374: In alternating current circuit at resonance, the angel of lead or lag is Options:
  A) π°
  B) (π)/2°
  C) (π)/3°
  D) 0°
  Show Answer
  The correct answer is B .
• Question 375:

  Which of the following statements is not true?

  Options:
  A) The mechanical advantage of a smooth inclined plane depends on the ratio of the length to the height of the plane.
  B) The efficiency of an inclined plane decreases as the slope increases.
  C) The effort required to push a given load up an inclined plane increases as the slope increases.
  D) As the slope of an inclined plane increases, the velocity ratio decreases.
  Show Answer
  The correct answer is A .
• Question 376: The net movement of solvent molecules from a region of high solvent potential to a region of lower solvent potential through a partially or semi permeable membrane is refer to as Options:
  A) Diffusion
  B) Osmosis
  C) Surface tension
  D) Cohesion
  Show Answer
  The correct answer is B .
• Question 377: An alternating source is connected in series to a capacitor of capacity reactance ${10}^3\sqrt{3}$ and a resistor of resistance 10³ Ohms. The Impedance of the circuit is... Options:
  A) $2000\sqrt{3}$ Ohms
  B) 2000 Ohms
  C) $1000\sqrt{3}$ Ohms
  D) 1000 Ohms
  Show Answer
  The correct answer is B .
• Question 378:
  

  The property of wave shown in the diagram above is?

  Options:
  A) Diffraction
  B) Refraction
  C) Polarisation
  D) Interference
  Show Answer
  The correct answer is A .
• Question 379: When a number of identical small magnets are arranged in a line, the strength of the resultant magnet Options:
  A) ia largest when they are arranged end to end
  B) is greatest when they are arrangedparallel with like poles adjacent to each other
  C) depends only on the number of magnets provided they arev parallel
  D) is greater when the magnets are arranged on a wooden surface than on a metaln surface
  Show Answer
  The correct answer is A .
• Question 380:
  

  The fiqure above represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40${}^o$, then the value of W is

  Options:
  A) 28.0N
  B) 48.0N
  C) 288.0N
  D) 50.0N
  Show Answer
  The correct answer is D .