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 631: If the fundamental frequency of a closed pipe organ on a day when the speed of sound is 340ms^-1 is 170Hz, then the length of the pipe is Options:
  A) 50cm
  B) 70cm
  C) 100cm
  D) 150cm
  E) 200cm
  Show Answer
  The correct answer is A .
• Question 632: A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally? Options:
  A) 30cm
  B) 10cm
  C) 20cm
  D) 25m
  Show Answer
  The correct answer is C .
• Question 633: Marching soldiers crossing a suspension bridge are usually advised to break their steps to avoid damaging the bridge owing to Options:
  A) oscillation
  B) resonance
  C) swinging
  D) vibration
  Show Answer
  The correct answer is B .
• Question 634: The unit of moment of a couple can be expressed in? Options:
  A) N m^-1
  B) N m^-2
  C) N m
  D) N m²
  Show Answer
  The correct answer is C .
• Question 635: 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 .
• Question 636: Two long parallel wires X and Y carry currents 3A and 5A each. if the force experienced by unit length is 5 x 10^-5N. the force per unit length experienced by wire Y is Options:
  A) 3 x 10^-5
  B) 3 x 10^-6
  C) 5 x 10⁵
  D) 5 x 10^-5
  Show Answer
  The correct answer is D .
• Question 637: Which of the following can be used to reduce local action in a Laclanche cell? Options:
  A) A carbon rod as the positive pole
  B) Pure zinc as the negative pole
  C) Potassium permanganate solution in contact with the positive pole
  D) common salt solution
  Show Answer
  The correct answer is C .
• Question 638: Which of the following statements are true of the law of universal gravitation? Options:
  A) any two bodies attract each other with a force which is proportional to the difference of their masses
  B) any two bodies attract each other with a force which is inversely proportional to the square of the distance between them
  C) any two bodies attract each other with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them
  D) any two bodies attract each other with a force which is proportional to the square of the distance between them
  E) any two bodies attract each other with a force which is proportional to the sum of their masses
  Show Answer
  The correct answer is C .
• Question 639: A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is Options:
  A) 1A
  B) 4A
  C) 16A
  D) 18A
  E) 36A
  Show Answer
  The correct answer is B .
• Question 640: What is the cost of running seven 40 W lamps and five 80 W la mps for 12 hours of the electrical energy cost N7.00kWk? Options:
  A) N80.00
  B) N45.36
  C) N65.00
  D) N57.12
  Show Answer
  The correct answer is D .