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 881:

  A magnet relay is a device used for?

  Options:
  A) reading the magnitude of magnetic flux
  B) controlling another circuit carrying larger current
  C) turning in sports
  D) storing magnetic field
  Show Answer
  The correct answer is B .
• Question 882:

  Zener diode is used for?

  Options:
  A) current amplification
  B) power amplification
  C) voltage regulation
  D) energy conversion
  Show Answer
  The correct answer is C .
• Question 883: If 8 x 10^-2J of work is required to move 100$\mu$C of charge from a point X to a point Y in an electrical circuit, the potential difference between X and Y is Options:
  A) 4.0 x 10² v
  B) 4.0 x 10⁴ v
  C) 8.0 x 10² v
  D) 8.0 x 10² v
  Show Answer
  The correct answer is C .
• Question 884:

  An air bubble of radius 4.5 cm initially at a depth of 12 m below the water surface rises to the surface. If the atmospheric pressure is equal to 10.34 m of water, the radius of the bubble just before it reaches the water surface is

  Options:
  A) 6.43 cm
  B) 8.24 cm
  C) 4.26 cm
  D) 5.82 cm
  Show Answer
  The correct answer is D .
• Question 885:

  

  The total power drawn from the cell in the circuit above is

  Note: The cell voltage is 12V and all three resistors are 4 ohm resistors.

  Options:
  A) 12W
  B) 24W
  C) 32W
  D) 40W
  Show Answer
  The correct answer is B .
• Question 886:

  If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

  Options:
  A) 84400m
  B) 69000m
  C) 61440m
  D) 24000m
  Show Answer
  The correct answer is C .
• Question 887:

  What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

  Options:
  A) N0.65
  B) N0.39
  C) N3.90
  D) N0.13
  Show Answer
  The correct answer is D .
• Question 888: The difference between X-rays and gamma rays is that Options:
  A) x-rays are more penetrating than gamma rays
  B) x-rays are electromagnetic radiations while gamma rays are negatively charged radiation
  C) x-rays have higher frequencies than gamma rays
  D) x-rays arise from energy changes in the electronic structure of atoms while gamma rays come from the nucleus
  Show Answer
  The correct answer is D .
• Question 889: The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for Options:
  A) improving the sharpness
  B) creating an inverted image
  C) magnification of the image
  D) erection of the image
  Show Answer
  The correct answer is D .
• Question 890: If the inclination at Ibadan is 7^oS, this means that Options:
  A) the angle between the geographic meridian and the magnetic meridian at Ibadan is 7^o
  B) the earth's magnetic intensity at Ibadan makes angle 7^o with the horizontal direction
  C) a magnetic needle will be inclined at 7^o to the vertical at Ibadan
  D) the north pole of a magnetic needle dips downward at Ibadan
  Show Answer
  The correct answer is B .