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 81: The combination of sound waves with different frequencies is known as Options:
  A) interference
  B) diffraction
  C) superposition
  D) forced vibration
  E) resonance
  Show Answer
  The correct answer is C .
• Question 82: An element and its isotope only differ in the number of Options:
  A) protons
  B) electrons
  C) ions
  D) neutrons
  Show Answer
  The correct answer is D .
• Question 83:

  I. The frictional force is independent of the area of the surfaces in conduct
  II. The frictional force depends on the nature of the surfaces in contact
  III. The frictional force depends on the speed of sliding
  IV. The frictional force is directly proportional to the normal reaction.

  Which combination of the above is true of sliding friction?

  Options:
  A) I, III and IV
  B) I, II and IV
  C) I, II and III
  D) II, III and IV
  Show Answer
  The correct answer is B .
• Question 84: Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror Options:
  A) 4. 0 cm
  B) 3. 0 cm
  C) 12.0 cm
  D) 9.0 cm
  Show Answer
  The correct answer is C .
• Question 85:

  The bond between silicon and germanium is

  Options:
  A) covalent
  B) trivalent
  C) dative
  D) ionic
  Show Answer
  The correct answer is A .
• Question 86:

  

  In the figure above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

  Options:
  A) both M and N have acquired negative charges
  B) both M and N have acquired positive charges
  C) M has acquired negative charge and N positive charge
  D) N has acquired negative charge and M positive charge
  Show Answer
  The correct answer is D .
• Question 87:

  The resultant capacitance in the figure above is

  Options:
  A) 0.4μf
  B) 0.8μf
  C) 1.8μf
  D) 4.5μf
  Show Answer
  The correct answer is B .
• Question 88: If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called Options:
  A) Doppler effect
  B) Resonance
  C) Ultra sound
  D) Diffraction of sound
  E) Rarefaction
  Show Answer
  The correct answer is A .
• Question 89: A body rolls down a slope from a height of 100m. its velocity at the foot of the slope is 20ms^-1. What percentage of its initial potential energy is converted into kinetic energy? [g = 10ms^-1] Options:
  A) 40%
  B) 35%
  C) 20%
  D) 15%
  Show Answer
  The correct answer is C .
• Question 90: If a current carrying coil is mounted on a metal frame, the back e.m.f. induced in the coil causes Options:
  A) inductance
  B) eddy currents
  C) elecro-magnetism
  D) dipole moment
  Show Answer
  The correct answer is B .