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 2081: Two thermo flasks of volume Vx and Vy are filled with liquid water at an initial temperature of 0^oC. After sometime the temperature were found to be 9x, 9y, respectively. Given that $\frac{Vx}{Vy}$ = 2 and $\frac{\theta x}{\theta y}$ = $\frac{1}{2}$ the ratio of the heat flow into the flask is Options:
  A) $\frac{1}{4}$
  B) $\frac{1}{2}$
  C) 4
  D) 1
  E) 2
  Show Answer
  The correct answer is D .
• Question 2082: A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C. Options:
  A) 6.0Ω
  B) 6.42Ω
  C) 7.6Ω
  D) 8.4Ω
  E) 16.0Ω
  Show Answer
  The correct answer is C .
• Question 2083: Which of the following is a non-renewable energy source? Options:
  A) Coal
  B) Hydro
  C) Ocean waves
  D) Solar
  E) Tides
  Show Answer
  The correct answer is A .
• Question 2084: A radioactive substance has a half-life of 20 days what fraction the original radiation nuclei will remain after 80 days? Options:
  A) (1)/32
  B) (1)/16
  C) (1)/ 8
  D) (1)/4
  Show Answer
  The correct answer is B .
• Question 2085:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 2086: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .
• Question 2087: In which of the following is the expansion of solids a disadvantage? Options:
  A) Electric iron
  B) Fire alarm
  C) The balance wheel of a watch
  D) The bimetallic thermometer
  E) The fitting of wheels in rims
  Show Answer
  The correct answer is C .
• Question 2088:

  I. It retains its magnetic much longer than steel.
  II. It is more easily magnetized than steel.
  III. It is more easily demagnetized than steel.
  IV. It produces a stronger magnet than steel.

  Which combination of the above makes iron preferable to steel in the making of electromagnets?

  Options:
  A) I and II only
  B) II and III only
  C) I, III, and IV only
  D) II, III and IV only
  Show Answer
  The correct answer is B .
• Question 2089:

  The linear expansivity of brass is 2 x 10${}^{-5}$ C${}^{-1}$. If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

  Options:
  A) 16.03cm${}^3$
  B) 15.09cm${}^3$
  C) 16.00cm${}^3$
  D) 15.03cm${}^3$
  Show Answer
  The correct answer is B .
• Question 2090: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .