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 671: A solid weighs 4.8g in air, 2.8g in water and 3.2g in kerosine. The ratio of density of the solid to that of the kerosine is Options:
  A) 12
  B) 3
  C) 2
  D) $\frac{3}{2}$
  E) $\frac{5}{4}$
  Show Answer
  The correct answer is B .
• Question 672: Which of the following is obtained when a magenta is mixed with green colour? Options:
  A) Yellow
  B) Blue
  C) White
  D) Red
  Show Answer
  The correct answer is C .
• Question 673: N.N.P.C. gas cylinder containing 15kg of cooking gas was left open, and the gas emptied in 3.8 minutes, at an average speed of 20 ms^-1. What force was exerted on the gas in the cylinder? Options:
  A) 132N
  B) 13.2N
  C) 1.32N
  D) 0.132N
  E) 0.013N
  Show Answer
  The correct answer is C .
• Question 674: A wave has a frequency of 2Hz and a wavelength of 30cm. The velocity of the wave is Options:
  A) 60.0ms^-1
  B) 6.0ms^-1
  C) 1.5ms^-1
  D) 0.6ms^-1
  Show Answer
  The correct answer is D .
• Question 675:

  The statement 'Heat lost by the hot body equals that gained by the cold one' is assumed when determining specific that heat capacity by the method of mixtures. Which of the following validates the assumption?

  I. Lagging the Calorimeter

  II. Ensuring that only S.I units are used

  III. Weighing the calorimeter, the lid and the stirrer.

  Options:
  A) I only
  B) I and II only
  C) I and III only
  D) II and III only
  Show Answer
  The correct answer is C .
• Question 676: In an experiment to determine terminal velocity, as the pressure increases, the viscosity off a liquid Options:
  A) increases
  B) decreases
  C) increases then decreases
  D) remains constant
  Show Answer
  The correct answer is D .
• Question 677: if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .
• Question 678:

  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 679:
  

  A 400 N box is being pushed across a level floor at a constant speed by a force P of 100 N at an angle of 30.0° to the horizontal, as shown in the the diagram below. What is the coefficient of kinetic friction between the box and the floor?

  Options:
  A) 0.19
  B) 0.24
  C) 0.40
  D) 0.22
  Show Answer
  The correct answer is A .
• Question 680:

  

  From the diagram above, the inductive reactance and the resistance R are respectively

  Options:
  A) 50Ω and 45Ω
  B) 25Ω and 51Ω
  C) 20Ω and 50Ω
  D) 10Ω and 49Ω
  Show Answer
  The correct answer is D .