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 1911: If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is Options:
  A) 5.00W
  B) 4.00W
  C) 2.00W
  D) 25W
  Show Answer
  The correct answer is B .
• Question 1912: In a resonance tube experiment, the effective length of the air column for the first resonance is 20cm when set into vibration by a tuning fork of frequency 480Hz. Neglecting and effect, the velocity of sound in air is Options:
  A) 96ms^-1
  B) 255ms^-1
  C) 340ms^-1
  D) 384ms^-1
  Show Answer
  The correct answer is D .
• Question 1913: A rod of length 10cm is heated through 100^oC and its final length is 10.26cm. What is the co-efficient of linear expansion of the rod? Options:
  A) 0.026 per degree centigrade
  B) 0.00026 per degree centigrade
  C) 0.26 per degree centigrade
  D) 1.0026 per degree centigrade
  E) 0.0026 per degree centigrade
  Show Answer
  The correct answer is B .
• Question 1914: What is the velocity of sound at 100 ^oC if the velocity of sound at 0 ^oC is 340ms ^-1? Options:
  A) 497m^-1
  B) 440m^-1
  C) 397m^-1
  D) 240m^-1
  Show Answer
  The correct answer is B .
• Question 1915: The length of a side of a metallic cube at 20° C is 5.0cm. Given that the linear expansively of the metal is 4.0 × 10^-5K^-1, find the volume of the cube at 120° C Options:
  A) 124.50cm³
  B) 125.00cm³
  C) 126.00cm³
  D) 126.25cm³
  E) 126.50cm³
  Show Answer
  The correct answer is E .
• Question 1916: A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is? Options:
  A) 37.50 cm
  B) 75.00 cm
  C) 18.75
  D) 25.00 cm
  Show Answer
  The correct answer is A .
• Question 1917:

  The pressure of two moles of an ideal gas at a temperature of 27^oC and volume 10^-2m³ is

  [R = 8.313 J mol^-1K^-1]

  Options:
  A) 4.99 x 10⁵ Nm^-2
  B) 9.80 x 10³ Nm^-2
  C) 4.98 x 10³ Nm^-2
  D) 9.80 x 10⁵ Nm^-2
  Show Answer
  The correct answer is A .
• Question 1918: Electrical appliances at home are normally earthed so that Options:
  A) the appliances are maintained at a lower p.d than the earth
  B) both the a.c and d.c sources can be used
  C) a person touching the appliances is safe from electric shock
  D) the appliances are maintained at a higher p.d than the earth
  Show Answer
  The correct answer is C .
• Question 1919: Which of the following is true of magnetism? Options:
  A) Iron fillings cling mainly round the ends of a bar magnet
  B) The freely suspended bar magnet comes to rest in the geographic north-south direction
  C) Like poles attract
  D) Iodestone is a non-magnetic oxide
  Show Answer
  The correct answer is B .
• Question 1920:

  

  In the diagram above , if the magnetic field points into the paper and the force on a current - carrying conductor points upwards, what is the direction of the current?

  Options:
  A) Upwards
  B) Downwards
  C) Right
  D) Left
  Show Answer
  The correct answer is D .