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 531: A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field B in the direction of the field. The force on the particle is Options:
  A) Bqv
  B) Bq$\frac{v}{m}$
  C) Bqvm
  D) mv$\frac{B}{q}$
  E) $\frac{mv}{Bq}$
  Show Answer
  The correct answer is C .
• Question 532: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 533: Which of the following is a secondary colour Options:
  A) blue
  B) orange
  C) red
  D) green
  Show Answer
  The correct answer is B .
• Question 534: The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is Options:
  A) 200Hz
  B) 400Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is B .
• Question 535: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 536: A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine Options:
  A) 80.0%
  B) 76.6%
  C) 66.7%
  D) 60.7%
  Show Answer
  The correct answer is C .
• Question 537: A car moves with an initial velocity of 25 ms^-1 and reaches a velocity of 45 ms^-1 in 10s. what is the acceleration of the car? Options:
  A) 2 ms^-2
  B) 5 ms^-2
  C) 20 ms^-2
  D) 25 ms^-2
  Show Answer
  The correct answer is A .
• Question 538: An engineer intends to deviate a light ray from its path by 120^o through reflection from a plane mirror. Calculate the angle of incidence Options:
  A) 60^o
  B) 40^o
  C) 30^o
  D) 20^o
  Show Answer
  The correct answer is C .
• Question 539: Two cars moving in the same direction have speeds of 100 kmh^-1 and 130 kmh^-1 what is the velocity of the faster car as measured by an observer in the slower car? Options:
  A) 30 kmh^-1
  B) 130 kmh^-1
  C) 200 kmh
  D) 230 kmh^-1
  Show Answer
  The correct answer is A .
• Question 540:

  Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 10⁶Nm^-2 with a volume of 10^-3m³.

  [R = 8.3jmol^-1K^-1]

  Options:
  A) 201^oC
  B) 126^oC
  C) 153^oC
  D) 185^oC
  Show Answer
  The correct answer is C .