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 721:

  A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms${}^{-1}$ from the top of a tower 10m high. Neglecting air resistance, its total energyjust before hitting the ground is? (Take g = 10ms${}^{-2}$)

  Options:
  A) 5J
  B) 10J
  C) 15J
  D) 20J
  Show Answer
  The correct answer is C .
• Question 722: All the heat generated in a 5 ohms resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid? Options:
  A) 120J
  B) 60Jg^-1
  C) 120Jg^-1
  D) 1500J
  E) 1500Jg^-1
  Show Answer
  The correct answer is C .
• Question 723: Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them?
  [G = 6.67 X 10^-11 Nm² Kg²] Options:
  A) 3.50 x 10^-10N
  B) 3.71 x 10^-8 N
  C) 3.57 x 10^-2N
  D) 4.00 x 10²N
  Show Answer
  The correct answer is B .
• Question 724: If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object Options:
  A) Is quadrupled
  B) Is halved
  C) Remains the same
  D) Is double
  Show Answer
  The correct answer is D .
• Question 725:

  A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.

  [Take g = 10 ms-2]

  Options:
  A) 195
  B) 271 m
  C) 391 m
  D) 136 m
  Show Answer
  The correct answer is C .
• Question 726: The instantaneous value of the induced e.m.f as a function of time is ε = ε_o sin ωt where ε_o is the peak value of the e.m.f. The instantaneous value of the e.m.f., one quarter of the period is Options:
  A) 0.00
  B) ^ε_o/₄
  C) ^ε_o/₂
  D) ε_o
  Show Answer
  The correct answer is D .
• Question 727: Dispersion of light by a glass prism is due to the Options:
  A) different colours of the glass
  B) different speeds of the various colours in glass
  C) defects in the glass
  D) high density of glass
  Show Answer
  The correct answer is B .
• Question 728:

  The sensitivity of a thermometer is

  Options:
  A) All of the above
  B) how quickly a temperature change can be detected
  C) the difference between the maximum and the minimum temperature
  D) the smallest temperature change that can be detected or measured
  Show Answer
  The correct answer is D .
• Question 729: If two charged plates are maintained at a potential difference of 3 kv, the work done in taking a charge of 600 µC across the field is? Options:
  A) 0.8 J
  B) 1.8 J
  C) 9.0 J
  D) 18.0 J
  Show Answer
  The correct answer is B .
• Question 730:

  At what frequency would a capacitor of 2.5μF

  Used in radio circuit have a resistance of 250Ω

  Options:
  A) π/800 Hz
  B) 800/π Hz
  C) 200π Hz
  D) 2000π Hz
  Show Answer
  The correct answer is B .