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 1471:

  

  In the diagram above, which of the following velocity-time graphs shows uniform acceleration of a body from rest?

  Options:
  A) C
  B) D
  C) B
  D) A
  Show Answer
  The correct answer is C .
• Question 1472: Thermal equilibrium between two object exist when Options:
  A) the temperature of both objects are equal
  B) the quantity of heat of both objects is the same
  C) the heat capacities of both objects are the same
  D) one object losses heat continuously to the other
  Show Answer
  The correct answer is A .
• Question 1473: When a certain a.c supply is connected to a lamp, it lights with the same brightness as it does with a 12 V d.c battery. Then r.m.s value of the a.c supply is? Options:
  A) 12.0 V
  B) 3.5 V
  C) 17.0 V
  D) 8.5
  Show Answer
  The correct answer is A .
• Question 1474:

  Which of the following may be used to explain a mirage?

  I. Layers of air near the road surface have varying refractive indices in hot weather

  II. Road surfaces sometimes become good reflectors in hot weather

  III. Light from the sky can be reflected upwards after coming close to the road surface.

  Options:
  A) I and III only
  B) II and III only
  C) II only
  D) I, II and III
  Show Answer
  The correct answer is A .
• Question 1475:

  In a radioactive series:

  ${}_{92}^{235}L{\to }_{93}^{235}M{\to }_{90}^{235}N{\to }_{90}^{235}\varphi$

  The particles emitted are respectively

  Options:
  A) $\beta \beta \alpha$
  B) $\alpha \gamma \beta$
  C) $\gamma \alpha \beta$
  D) $\alpha \alpha \beta$
  E) $\beta \alpha \beta$
  Show Answer
  The correct answer is C .
• Question 1476: Which of the following statements is (are) NOT true about the emission of the photoelectrons from metallic surfaces? i. all metallic surfaces emits the same number of photoelectrons in a given light ii. most metallic surfaces emit the same number of photoelectrons in visible and infra-red light iii. a metallic surface emits photoelectrons only if the frequency of the incident light is higher than its own characteristics threshold frequency Options:
  A) i only
  B) ii only
  C) i and ii
  D) ii and iii
  E) iii only
  Show Answer
  The correct answer is E .
• Question 1477: A household refrigerator is rated 200 watts. If electricity costs 5k per kWh, what is the cost of operating it in 20 days? Options:
  A) N4.80
  B) N48.00
  C) N480.00
  D) N4800.00
  Show Answer
  The correct answer is C .
• Question 1478: An air bubble rises from the bottom to the top of a water dam which is 40m deep. The volume of the bubble just below the surface is 2.5cm³. Find its volume at the bottom of the dam, if atmospheric pressure is equivalent to 10m water Options:
  A) 0.0cm³
  B) 2.0cm³
  C) 1.6cm³
  D) 0.625cm³
  E) 0.5cm³
  Show Answer
  The correct answer is E .
• Question 1479:

  A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

  Options:
  A) 2400 J
  B) 9600 J
  C) 1500 J
  D) 1200 J
  Show Answer
  The correct answer is A .
• Question 1480: How much heat is absorbed when a block of copper of mass 0.05kg and specific heat capacity 390Jkg^-1K^-1 is heated from 20^oC to 70^oC? Options:
  A) 39 . 98 x 10^-1J
  B) 9.75 x 10²J
  C) 3.98 x 10³J
  D) 9.75 x 10³J
  Show Answer
  The correct answer is B .