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 371: When the brakes in a car are applied, the frictional force force on the tyres is Options:
  A) is a disadvantage because it is in the direction of the motion of the car
  B) is a disadvantage because it is in the opposite direction of the motion of the car
  C) is an advantage because it is in the direction of the motion of the car
  D) is an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 372: The major difference between a pure semiconductor and a pure metal is that Options:
  A) metals are harder than semiconductor
  B) while resistance of metals decrease with temperature , the reverse is the case for semiconductor
  C) the resistance of metals increases with temperature, while for semiconductors, it is the reverse
  D) metals have forbidden gaps while semiconductors have not
  Show Answer
  The correct answer is C .
• Question 373: Two masses 40g and 60g respectively, are attached firmly to the ends of the light meter rule. The center of gravity of the system is Options:
  A) at the mid-point of the meter rule
  B) 40cm from the lighter mass
  C) 40cm from the heavier mass
  D) 60cm from the heavier mass
  E) indeterninate because the meter-rule is light
  Show Answer
  The correct answer is C .
• Question 374: A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in the primary coil. Options:
  A) 0.625A
  B) 1.600A
  C) 2.500A
  D) 6.250A
  Show Answer
  The correct answer is A .
• Question 375: Dispersion of light by a glass prism is due to the Options:
  A) different colours of the glass
  B) different speeds of the various colours in glass
  C) defects in the glass
  D) high density of glass
  Show Answer
  The correct answer is B .
• Question 376:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 377:

  

  The diagram above represents the field pattern obtained by bringing the poles of two magnets together.The poles must be

  Options:
  A) S-S poles
  B) S-N poles
  C) N-S poles
  D) N-N poles
  Show Answer
  The correct answer is A .
• Question 378: A lens of focal length 12.0cm forms an upright image three times the size of a real object. The distance between the object and the images is Options:
  A) 8.0cm
  B) 16.0cm
  C) 24.0cm
  D) 32.0cm
  Show Answer
  The correct answer is D .
• Question 379:

  In a radioactive series:

  ${}_{92}^{235}L{\to }_{93}^{235}M{\to }_{90}^{235}N{\to }_{90}^{235}\varphi$

  The particles emitted are respectively

  Options:
  A) $\beta \beta \alpha$
  B) $\alpha \gamma \beta$
  C) $\gamma \alpha \beta$
  D) $\alpha \alpha \beta$
  E) $\beta \alpha \beta$
  Show Answer
  The correct answer is C .
• Question 380: A travelling wave moving from left to right has an amplitude of 0.15m, a frequency of 550Hz and a wavelength of 0.01m. The equation describing the wave is Options:
  A) y = 0.15 sin 200π(x - 5.5t)
  B) y = 0.15 sin π(0.01x - 5.5t)
  C) y = 0.15 sin 5.5π(x - 200t)
  D) y = 0.15 sin π(550x - 0.01t)
  Show Answer
  The correct answer is A .