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 551:
  

  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 552:
  

  In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?

   

  Options:
  A) Temperature is a measure of the average kinetic energy of the molecules of a substance
  B) Heat is a measure of the total kinetic energy of the molecules in a system
  C) Different materials require different amounts of heat to cause a given change in temperature
  D) All of the above
  Show Answer
  The correct answer is D .
• Question 553:

  A convex mirror is used as a driving mirror because

  I. its image is erect

  II. It has a large field of view

  III. It has a long focal length

  Identify the CORRECT statement(s)

  Options:
  A) I and III only
  B) I and II only
  C) II and IIII only
  D) I, II and III only
  Show Answer
  The correct answer is B .
• Question 554:

  I. Increase the melting point of the liquid.

  II. Increase the boiling point of the liquid.

  III. Decrease the melting point of the liquid.

  IV. Decrease the boiling point of the liquid.

  Which of the statement above about the effect on increase in pressure in a liquid are correct?

  Options:
  A) I and II only
  B) I and III only
  C) II and III only
  D) III and IV only
  Show Answer
  The correct answer is C .
• Question 555:

  A narrow beam of white light can be split up into different colours by a glass prism. The correct explanation is that

  Options:
  A) white light Is an electromagnetic wave
  B) the prism has all the colours of the white light
  C) different colours of white light travel with different speeds in glass
  D) white light has undergone total Internal reflection in the prism
  Show Answer
  The correct answer is C .
• Question 556: In the calibration of an ammeter using faraday's laws of electrolysis, the ammeter reading is kept constant at 1.2A. If 0.990g of copper is deposited in 40 minutes , the correction to be applied to the ammeter is Options:
  A) 0.03A
  B) 0.04A
  C) 0.05A
  D) 0.06A
  Show Answer
  The correct answer is C .
• Question 557: Which of the following phenomena explains the formation of a mirage? i. Reflection ii. Refraction iii. Diffraction Options:
  A) i and ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .
• Question 558: Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms^-2. [g = 10ms^-2] Options:
  A) 686N
  B) 595N
  C) 581N
  D) 105N
  Show Answer
  The correct answer is D .
• Question 559:

  The pitch of an acoustic device can be increased by

  Options:
  A) decreasing the loudness
  B) increasing the intensity
  C) increasing the frequency
  D) decreasing the intensity
  Show Answer
  The correct answer is C .
• Question 560:

  Two divers G and H are at depths 20m and 40m, respectively below the water surface in a lake. The pressure on G is p${}_1$ while the pressure on H is P${}_2$, If the atmospheric pressure is equivalent to 10mof water, then the value of P${}_2$/P${}_1$ is?

  Options:
  A) 0.50
  B) 0.60
  C) 1.67
  D) 2.00
  Show Answer
  The correct answer is C .