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 51: Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if U and V are the object and image distances respectively? Options:
  A) $\frac{V}{r}$ - 1
  B) $\frac{2V}{r}$ - 1
  C) $\frac{U}{r}$ - 1
  D) $\frac{2U}{r}$ - 1
  Show Answer
  The correct answer is D .
• Question 52:

  In a resonance tube experiment, a tube of fixedlength in closed at one end and several turningforks of increasing frequency used to obtainresonance at the open end. If the turning fork withthe lowest frequency which gave resonance had a frequency ƒ₁ and the next turning fork to giveresonance had a frequency ƒ₂, find the ratio ƒ₂/ ƒ₁.

  Options:
  A) 2
  B) 3
  C) 1/2
  D) 8
  Show Answer
  The correct answer is D .
• Question 53: A stone of mass 0.7 kg is projected vertically upward with a speed of 5 ms-1. Calculate the maximum height reached. [g =10ms^-2] Options:
  A) 1.25m
  B) 1.50m
  C) 2.50m
  D) 3.75m
  E) 5.00Nm
  Show Answer
  The correct answer is A .
• Question 54: The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a Options:
  A) concave mirror of focal length 5cm
  B) concave mirror of focal length 10cm
  C) convex mirror of focal length 5cm
  D) convex mirror of focal length 20cm
  Show Answer
  The correct answer is A .
• Question 55: Volatile liquids usually Options:
  A) Have high boiling points
  B) have low boiling points
  C) have high densities
  D) have high melting points
  Show Answer
  The correct answer is B .
• Question 56: The thermometric substance of an absolute thermometer is Options:
  A) alcohol
  B) mercury
  C) helium
  D) platinum
  Show Answer
  The correct answer is B .
• Question 57: A string is sustaining a stationary wave when Options:
  A) the frequency of the wave is not proportional to the wavelength of the wave
  B) the amplitude of vibration is always zero
  C) two equal waves are travelling in opposite directions
  D) the waves are longitudinal
  E) the frequency is directly proportional to the length of the string
  Show Answer
  The correct answer is C .
• Question 58:

  A lead bullet of mass 0.05kg is fired with a velocity of 200ms${}^{-1}$ into a block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is?

  Options:
  A) 50J
  B) 100J
  C) 150J
  D) 200J
  Show Answer
  The correct answer is A .
• Question 59: A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil. Options:
  A) 200
  B) 100
  C) 250
  D) 150
  Show Answer
  The correct answer is A .
• Question 60: I. MeltingII. Boiling III. RefractionIV. ConductionWhich combination of the above is evident of the molecular nature of matter? Options:
  A) II , III and IV only
  B) I ,II and IV only
  C) I , III and IV only
  D) I , II and III only
  Show Answer
  The correct answer is B .