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 1041: 2 kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes. what is the increase in temperature of the water?
  [specific heat capacity of water = 4200 jkg ^-1k^-1] Options:
  A) 30°
  B) 25°
  C) 15°
  D) 10°
  Show Answer
  The correct answer is D .
• Question 1042: Heat is supplied uniformly at the rate of 100W to 1.0 x 10^-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5^oC, then the specific heat capacity of the liquid is Options:
  A) 2.0 x 10²Jkg^-1k^-1
  B) 2.0 x 10²Jkg^-1
  C) 4.0 x 10⁴Jkg^-1k^-1
  D) 4.0 x 10⁴kg^-1
  E) 8.4 x 10³Jkg^-1k^-1
  Show Answer
  The correct answer is C .
• Question 1043: A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen? Options:
  A) 0.05m
  B) 0.15m
  C) 0.30m
  D) 1.00m
  Show Answer
  The correct answer is A .
• Question 1044:

  If an object whose mass is 3kg moves in a circular path of a radius of 0.7m, and records a speed at 2m/s, what is the result of the angular velocity?

  Options:
  A) 4 rads^–1
  B) 1 rads^–1
  C) 3 rads^–1
  D) 2 rads^–1
  Show Answer
  The correct answer is C .
• Question 1045: A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration Options:
  A) 0.40ms^-2
  B) 1.40ms^-2
  C) 0.26ms^-2
  D) 2.60ms^-2
  E) 3.40ms^-2
  Show Answer
  The correct answer is D .
• Question 1046: A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is Options:
  A) 3m
  B) 5m
  C) 6m
  D) 10m
  Show Answer
  The correct answer is C .
• Question 1047: What is the acceleration due to gravity 'g' on the moon, if g is 10^-2 on the earth? Options:
  A) 0. 10 ms^-2
  B) 0.74ms^-2
  C) 1.6ms^-2
  D) 10.00ms^-2
  Show Answer
  The correct answer is C .
• Question 1048: If a resistance is halved in value and the potential difference across it is tripled, then the ratio of the new current to the old one is Options:
  A) 1 : 6
  B) 1 : 3
  C) 2 : 1
  D) 6 : 1
  Show Answer
  The correct answer is D .
• Question 1049: The electrochemical equivalent of platinum is 5.0 x 10^-7kgC^-1 to plate-out 1.0kg of platinum, a current of 100A must be passed through an appropriate vessel for Options:
  A) 5.6 hours
  B) 56 hours
  C) 1.4 x 10^{4 hours}
  D) 2.0 x 10^{4 hours}
  Show Answer
  The correct answer is A .
• Question 1050:

  An a.c of 1A at a frequency of 800 cycles per second flows through a coil, the inductance of which is 2.5mH and the resistance of which is 5Ω. What is the power absorbed in the Coil?

  Options:
  A) 5W
  B) 6W
  C) 7W
  D) 8W
  Show Answer
  The correct answer is A .