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 2231:

  

  The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

  Options:
  A) The solid will fall over if the vertical line through G lies outside the base
  B) The solid will fall over if the vertical line through lies inside the base
  C) The solid will not fall over if the vertical line through G lies outside the base
  D) The solid can never fall over
  Show Answer
  The correct answer is A .
• Question 2232: The main function of the commutator in a simple d.c. motor is to Options:
  A) enable the armature to rotate freely
  B) increase the flux linking the armature windings
  C) maintain a direct current in the armature
  D) provide uniform magnetic field around the armature
  E) reverse the direction of the current in the armature.
  Show Answer
  The correct answer is E .
• Question 2233:

  Heat may be transferred by conduction, convention and radiation. By which of these methods does heat travel through vacuum?

  Options:
  A) Conduction only
  B) Convection only
  C) Radiation only
  D) All these methods
  Show Answer
  The correct answer is C .
• Question 2234: The particle that is responsible for the nuclear fission in a nuclear reactor is Options:
  A) neutron
  B) prton
  C) electron
  D) photon
  Show Answer
  The correct answer is A .
• Question 2235: Which of the following is stored by a dry Leclanche cell? Options:
  A) Electrical power
  B) Kinetic energy
  C) Electric current
  D) Chemical energy
  Show Answer
  The correct answer is D .
• Question 2236: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 2237: A cell of internal resistance 0.01Ω can be measured accurately using the Options:
  A) Ohm meter
  B) metre bridge
  C) potentiometer
  D) electroscope
  Show Answer
  The correct answer is C .
• Question 2238:

  According to kinetic molecular model, in gases

  Options:
  A) The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern
  B) The particles occur in clusters with molecules slightly farther apart
  C) The molecule are very fast apart and occupy all the space made available
  D) The particle vibrate about fixed positions and are held together by the strong intermolecular bonds between them
  Show Answer
  The correct answer is C .
• Question 2239: 1kg of copper is transferred quickly from boiling water to a block of ice. Calculate the mass of ice melted, neglecting heat loss. [specific heat capacity of copper 400Jkg^-1K^-1 and latent heat of fusion of ice 333 x 10³Jkg^-1] Options:
  A) 60g
  B) 67g
  C) 120g
  D) 133g
  Show Answer
  The correct answer is C .
• Question 2240: The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz? Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is A .