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 701:

  

  In the diagram above, MN is perpendicular to ON and MR what is the difference between the moment about N of the force of 20 Newtons applied along MP an its moment about 0

  Options:
  A) Zero
  B) 0.2N.m
  C) 0.4N.m
  D) 0.8N.m
  E) 0.6N.m
  Show Answer
  The correct answer is A .
• Question 702:

  

  The effect of closing the key K in the circuit shown above would be to

  Options:
  A) increase the current by 0.6A
  B) reduce the current by 0.6A
  C) increase the current by 0.4A
  D) keep the current unchanged
  Show Answer
  The correct answer is C .
• Question 703: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 704: An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is Options:
  A) 0.75cm
  B) 4.00cm
  C) 8.00cm
  D) 12.00cm
  Show Answer
  The correct answer is D .
• Question 705: A brass cube of side 10cm is heated through 30°C. If the linear expansivity of brass is 2.0 × I0^-5 K^-1 , what is the increase in its volume? Options:
  A) 0.06 cm³
  B) 0.18cm³
  C) 0.60cm³
  D) 1.20cm³
  E) 1.80cm³
  Show Answer
  The correct answer is E .
• Question 706:
  

  Calculate the effective capacitance of the circuit in the diagram given

  Options:
  A) 4μf
  B) 3μf
  C) 2μf
  D) 1μf
  Show Answer
  The correct answer is D .
• Question 707: The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is Options:
  A) 32^oC
  B) 48^oC
  C) 56^oC
  D) 65^oC
  E) 75^oC
  Show Answer
  The correct answer is C .
• Question 708: A rocket burns fuel at the rate of 10kgs^-1 and ejects it with velocity of 5 x 10³ms^-1. The thrust exerted by the gas on the rock is Options:
  A) 2.5 x 10⁷N
  B) 5.0 x 10⁴N
  C) 5.0 x 10²N
  D) 2.0 x 10^-3N
  Show Answer
  The correct answer is B .
• Question 709:

  

  Given the inductor of inductance 5mH, 10mH and 20mH connected in series, the effective inductance is

  Options:
  A) 0.35mH
  B) 3.50mH
  C) 2.90mH
  D) 35.0mH
  Show Answer
  The correct answer is D .
• Question 710: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .