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 1391:

  Two force each of 10N acts on a body, one towards the north and the other towards the east.

  The magnitude and the direction of the resultant force are

  Options:
  A) 20N, 45°E
  B) 20N, 45°W
  C) 10√2N, 45°W
  D) 10√2N, 45°E
  Show Answer
  The correct answer is D .
• Question 1392: A wheel and axle have radii 80cm and 10cm respectively. If the efficiency of the machine is 0.85, an applied force of 1200N to the wheel will raise a load of Options:
  A) 8.0N
  B) 6.8N
  C) 8160N
  D) 9600N
  Show Answer
  The correct answer is C .
• Question 1393: Which of the following waves is both transverse and mechanical? Options:
  A) Water waves
  B) Radio waves
  C) Sound waves
  D) X-rays
  Show Answer
  The correct answer is A .
• Question 1394: An electric charge could be transmitted through Options:
  A) wood, rubber and stone
  B) paper, clay and plastic
  C) glass, acid and cloth
  D) The human body, water and metals
  E) all of the above
  Show Answer
  The correct answer is D .
• Question 1395: A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5v. the resistance of the galvanometer is Options:
  A) 1Ω
  B) 2Ω
  C) 5Ω
  D) 10Ω
  Show Answer
  The correct answer is D .
• Question 1396:

  

  If ray travelling in air is incident on a transparent medium as shown in the diagram, the refractive index of the medium is given as

  Options:
  A) cosα / sinβ
  B) sinα / sinβ
  C) cosβ / sinα
  D) sinβ / sinα
  Show Answer
  The correct answer is A .
• Question 1397: The bulb of a motorcycle head-lamp is marked 40W, 6V. The resistance of the filament when it is switched on is Options:
  A) $\frac{6^2}{{40}^2}$ohms
  B) $\frac{40}{6^2}$ohms
  C) $\frac{40}{6}$ohms
  D) 6 x 40 ohms
  E) $\frac{6^2}{40}$ohms
  Show Answer
  The correct answer is E .
• Question 1398: The difference observed in solids, liquids and gases can be accounted for by Options:
  A) The different molecules in each of them
  B) The spaces and forces acting between the molecules
  C) Thier melting points
  D) Their relative massess
  Show Answer
  The correct answer is B .
• Question 1399:

  A cannon is fired from town X, after how long is the sound heard at a town Y 4.95 km away?

  [velocity of sound in the air = 330 ms^-1]

  Options:
  A) 30 s
  B) 10 s
  C) 10 s
  D) 15 s
  Show Answer
  The correct answer is D .
• Question 1400: A radioactive substance has a half life of 20 days. What fraction of the original radioactive nuclei will remain after 80 days? Options:
  A) $\frac{1}{32}$
  B) $\frac{1}{16}$
  C) $\frac{1}{8}$
  D) $\frac{1}{4}$
  Show Answer
  The correct answer is B .