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 571:
  

  Find the tension in the two cords shown in the figure above. Neglect the mass of the cords, and assume that the angle is 38° and the mass m is 220 kg

  [Take g = 9.8 ms-2]

  Options:
  A) $T_1$ = 2864 N, $T_2$= 3612 N
  B) $T_1$= 3612 N, $T_2$ = 2864 N
  C) $T_1$= 3502 N, $T_2$= 2760 N
  D) $T_1$ = 2760 N, $T_2$ = 3502 N
  Show Answer
  The correct answer is C .
• Question 572:

  The diagram shows a uniform meter rule AB which balances horizontally at the 90cm mark when a mass of 0.2kg is suspended from B. Calculate the mass of the meter rule.

  Options:
  A) 0.05kg
  B) 0.20kg
  C) 0.80kg
  D) 1.00kg
  Show Answer
  The correct answer is A .
• Question 573:
  

  On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?

  Options:
  A) 70
  B) 62
  C) 80
  D) 42
  Show Answer
  The correct answer is A .
• Question 574:

  Which of the following statements about radioactivity is true?

  (i) Alpha particle is positively charged

  (ii)Beta particle is negativelycharged

  (iii) Gamma ray is neutral

  (iv) Beta particle has thesame massas helium atom

  (v) Gamma ray is charged.

  Options:
  A) i, ii, iii, iv only
  B) i, ii, iii only
  C) iv and v only
  D) i, ii and v only
  Show Answer
  The correct answer is B .
• Question 575: Heat is supplied to a block of ice 0^o until half of it has melted. Which of the following statements is true? Options:
  A) the temperature rises and the ice exoands
  B) the temperature remains constant and the volume of ice decreases
  C) the ice gives out heat as it melts
  D) the mass remains constant and the temperature increases
  E) the mass decreases because some heat is lost to the atmosphere
  Show Answer
  The correct answer is B .
• Question 576: A wire of length 100.0m at 30^o has linear expansive of 2x10^-5K^-1 Calculate the length of the wire at a temperature of - 10^oC Options:
  A) 100.08m
  B) 100.04m
  C) 99.96m
  D) 99.92m
  Show Answer
  The correct answer is D .
• Question 577: A pipe of length 45cm is closed at the end. Calculate the fundamental frequency of the sound wave generated in the pipe if the velocity of sound in air is 360ms^-1 [Neglect end correction] Options:
  A) 5.5Hz
  B) 148.5Hz
  C) 200.0Hz
  D) 550.0Hz
  Show Answer
  The correct answer is C .
• Question 578: In a resonance tube experiment, the effective length of the air column for the first resonance is 20cm when set into vibration by a tuning fork of frequency 480Hz. Neglecting and effect, the velocity of sound in air is Options:
  A) 96ms^-1
  B) 255ms^-1
  C) 340ms^-1
  D) 384ms^-1
  Show Answer
  The correct answer is D .
• Question 579: The number of neutrons contained in the nucleus ${}_{92}^{238}U$ is Options:
  A) 92
  B) 146
  C) 238
  D) 330
  Show Answer
  The correct answer is B .
• Question 580:

  The limiting frictional force between two surfaces depends on

  I. the normal reaction between the surfaces

  II. the area of surface in contact

  III. the relative velocity between the surfaces

  IV. the nature of the surfaces

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