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 51:

  An astronomical telescope is said to be in normal adjustment when the?

  Options:
  A) eye is accommodated
  B) focal length of an object lens is longer than that of eye piece
  C) final image is at the near point of eye
  D) final image is at infinity
  Show Answer
  The correct answer is D .
• Question 52: A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is Options:
  A) 0.2N
  B) 0.8N
  C) 3.2N
  D) 8.0N
  Show Answer
  The correct answer is B .
• Question 53:

  

  The total resistance measured at PQ in the diagram above is

  Options:
  A) 18.0Ω
  B) 11.0Ω
  C) 4.0Ω
  D) 2.0Ω
  Show Answer
  The correct answer is C .
• Question 54: At a fixed point below a liquid surface, the pressure downwards is P₁ and pressure upwards is P₂. It can be deduced that Options:
  A) P₁ > P₂
  B) P₁ ≥ P₂
  C) P₁< P₂
  D) P₁ = P₂
  Show Answer
  The correct answer is A .
• Question 55: In a wheel and axle mechanism the diameters of the wheel and axle are 40cm and 8cm respectively. Given that the machine is 80% efficient, what effort is required to lift a load of 100N? Options:
  A) 20N
  B) 25N
  C) 50N
  D) 80N
  Show Answer
  The correct answer is B .
• Question 56: If silicon is doped with phosphorus, what type of semiconductor material will be formed? Options:
  A) Zener material
  B) P-n junction
  C) n-type
  D) p-type
  Show Answer
  The correct answer is C .
• Question 57:

  What is the amount of heat required to raise the temperature of a 0.02 kg of ice cube from $-{10}^{o}C$ to ${10}^{o}C$ ?

  [specific latent heat of fusion of ice = 3.34 x ${10}^5$ $Jk{g}^{-}1$, Specific heat capacity of water = 4200 $Jk{g}^{-}1$$k^{-}1$

  Specific heat capacity of ice = 2100 $Jk{g}^{-}1$$k^{-}1$

  Options:
  A) 6680 J
  B) 1680 J
  C) 7520 J
  D) 7940 J
  Show Answer
  The correct answer is D .
• Question 58: An elevator of mass 4800kg is supported by a cable which can safely withstand a maximum tension of 60 000N. The maximum upward acceleration the elevator can have is Options:
  A) 2.5ms^-2
  B) 5.0ms^-2
  C) 7.5ms^-2
  D) 10.0ms^-2
  Show Answer
  The correct answer is A .
• Question 59: Mercury is suitable as a barometric fluid because it Options:
  A) expands uniformly
  B) is opaque
  C) is several times denser than water
  D) is a good conductor of heat
  Show Answer
  The correct answer is C .
• Question 60: The r.m.s value of a supply voltage is quoted at 200v. What is the approximate peak value of the voltage? Options:
  A) 200volts
  B) 300volts
  C) 283volts
  D) 250volts
  Show Answer
  The correct answer is C .