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 61: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 62:

  Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss (specific heat capacity of copper = 400Jkg${}^1$k${}^{-1}$, latent heat of fusion of ice = 3.3 x 10${}^5$Jkg${}^{-1}$)

  Options:
  A) $\frac{8}{33}$kg
  B) $\frac{3.3}{80}$kg
  C) $\frac{80}{33}$kg
  D) $\frac{3.3}{8}$kg
  Show Answer
  The correct answer is A .
• Question 63:

  

  In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at ₦40, the cost of keeping the bulb lighted for a day is

  Options:
  A) ₦1,920.00
  B) ₦192.00
  C) ₦19.20
  D) ₦1.92
  Show Answer
  The correct answer is B .
• Question 64: A vapour is said to be saturated when Options:
  A) moer molecules return to the liquid than leave it
  B) a dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature
  C) the vapour pressure is atmospheric
  D) the temperature of the vapour varies
  E) all molecules are moving with the same speed
  Show Answer
  The correct answer is B .
• Question 65:

  A radioactive isotope has a decay constant of 10^-6s^-1.

  Calculate its half - life?

  Options:
  A) 5.93 x 10⁶s
  B) 6.93 x 10⁷s
  C) 6.93 x 10⁹s
  D) 5.93 x 10⁷s
  Show Answer
  The correct answer is B .
• Question 66:

  According to kinetic molecular model, in gases

  Options:
  A) The molecules are very fast apart and occupy all the space made available.
  B) The particles occur in clusters with molecules slightly farther apart.
  C) The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern.
  D) The particles vibrate about fixed positions and are held together by the strong inter-molecular bond between them.
  Show Answer
  The correct answer is A .
• Question 67: The relationship between the period T and the length T of a smile pendulum is T = 2$\pi$ $(\frac{I}{g}{)}^{\frac{1}{2}}$. From experiment data of T and I, one can obtain the following graphs, i. T vs.I ii. T vs I² iii. T² vs. I iv. T vs $\sqrt{I}$ v. logT vs logI. Which of the following graphs, are linear? Options:
  A) all
  B) only i and ii
  C) only iii and iv
  D) iii,iv and v
  E) none of them
  Show Answer
  The correct answer is D .
• Question 68: A boy ran a distance of 200m in 24s. His average speed was 8.3ms^-1. Which of the following is correct about the units in which the statements above are expressed? Options:
  A) All the units are fundamental.
  B) All the units are derived
  C) All the units except one are S.I units
  D) Two of the units are fundamental and one derived.
  E) None of the units is S.I units.
  Show Answer
  The correct answer is D .
• Question 69: I. for current amplification.II. for voltage stabilization. III. for power amplification.IV. as a switch.which of the above are the uses of transistor? Options:
  A) I,II,III and IV
  B) I,III, and IV only
  C) I, II and III only
  D) I,II and IV only
  Show Answer
  The correct answer is B .
• Question 70:

  

  In the circuit diagram above , the ammeter reads a current of 3A when R is 5Ω and 6A when R is 2Ω. Determine the value of x

  Options:
  A) 8Ω
  B) 2Ω
  C) 10Ω
  D) 4Ω
  Show Answer
  The correct answer is C .