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 2271:

  Which of the following media allow the transmission of sound waves through them?

  I. air

  II. liquid

  III. solids

   

  Options:
  A) I and II only
  B) I and III only
  C) II and III only
  D) I, II and III
  Show Answer
  The correct answer is D .
• Question 2272:

  An explosion occurs at an altitude of 312 m above the ground. If the air temperature is -10.00°C, how long does it take the sound to reach the ground?

  [velocity of sound at $0^{o}C$ = 331 ms-1]

  Options:
  A) 0.94s
  B) 0.96s
  C) 0.93s
  D) 0.95s
  Show Answer
  The correct answer is B .
• Question 2273: In which of the following is surface tension important? Options:
  A) the floating of a ship in water
  B) the floating of a dry needle in water
  C) the floating of a baloon in air
  D) the diffusion of sugar solution across a membrane
  Show Answer
  The correct answer is B .
• Question 2274: A ray of light is incident at an angle of 30^o on one top surface of a parallel-sided glass block of refractive index 1.5. The ray finally emerges from the lower surface. What is the angular deviation of the emergent ray? Options:
  A) 60^o
  B) 39^o
  C) 28^o
  D) 0^o
  Show Answer
  The correct answer is D .
• Question 2275:

  

  In the above circuit, The fuse wire melts when

  Options:
  A) K is Opened
  B) K is closed
  C) the 14 ohm resistor is doubled with k closed
  D) the 6 ohm resistor is doubled with k closed
  Show Answer
  The correct answer is B .
• Question 2276: In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is Options:
  A) 70Hz
  B) 840Hz
  C) 1120Hz
  D) 1960Hz
  Show Answer
  The correct answer is D .
• Question 2277:

  

  In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is

  Options:
  A) 3.0 x 10⁴J
  B) 3.0 x 10²J
  C) 2.5 x 10^-2J
  D) 6.0 x 10^-3J
  Show Answer
  The correct answer is C .
• Question 2278: An element and its isotope only differ in the number of Options:
  A) protons
  B) electrons
  C) ions
  D) neutrons
  Show Answer
  The correct answer is D .
• Question 2279: In a semi conductor junction diode, as the depletion or barrier layer is forward-biased, the layer Options:
  A) widens
  B) narrows
  C) remains constant
  D) widens then narrows
  Show Answer
  The correct answer is C .
• Question 2280: A temperature scale has a lower fixed point of 40mm and a upper fixed point of 200mm. What is the reading on this scale when a thermometer reads 60^oC? Options:
  A) 33.3mm
  B) 36.0mm
  C) 96.0mm
  D) 136.0mm
  Show Answer
  The correct answer is D .