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 791:

  Which of the following pairs ispart of the electromagnetic spectrum?

  I. Radio waves

  II. sound waves

  III. Gamma rays

  IV. water waves

  Options:
  A) I and II
  B) III and IV
  C) I and III
  D) II and IV
  Show Answer
  The correct answer is C .
• Question 792:

  

  In the diagram above, if each of the resistors can dissipate a maximum of 18W without becoming excessively heated, what is the maximum power the circuit can dissipate?

  Options:
  A) 27W
  B) 18W
  C) 9W
  D) 5W
  Show Answer
  The correct answer is A .
• Question 793: A Motor Tyre is inflated to pressure of 2.0 x 10⁵Nm^-2 when the temperature of air is 27^oC. What will be the pressure in it at 87^oC assuming that the volume of the Tyre does not change? Options:
  A) 2.6 x 10⁵Nm^-2
  B) 2.4 x 10⁵Nm^-2
  C) 2.2 x 10⁵Nm^-2
  D) 1.3 x 10⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 794: Which of the following is the exclusive property of a transverse wave? Options:
  A) diffraction
  B) refraction
  C) compression
  D) polarization
  Show Answer
  The correct answer is D .
• Question 795:

  Metal rods of length 20m each are laid end to end to form a bridge at 25^oC. What gap will be provided between consecutive rails for the bridge to withstand 75^oC?

  [Linear expansivity of the material = 2.0 x 10^-5K^-1]

  Options:
  A) 0.20m
  B) 0.22m
  C) 0.25m
  D) 0.02m
  Show Answer
  The correct answer is D .
• Question 796: The force of repulsion between two point positive charges 5$\mu$C and 8$\mu$C separated at a distance of 0.02 map art is. [$\frac{1}{4\pi {\epsilon }_o}$ = 9 x 10⁹Nm²C^-2] Options:
  A) 1.8 x 10^-10N
  B) 9.0 x 10^-8N
  C) 9.0 x 10²N
  D) 4.5 x 10³N
  Show Answer
  The correct answer is C .
• Question 797: When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as Options:
  A) beats
  B) echoing
  C) resonance
  D) reverberation
  Show Answer
  The correct answer is C .
• Question 798: A coin place below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block. The apparent displacement of the coin is Options:
  A) 3 cm
  B) 5 cm
  C) 6 cm
  D) 8 cm
  Show Answer
  The correct answer is A .
• Question 799:

  Electrical appliances in homes are normally earthed so that

  Options:
  A) a person touching the appliances is safe from electric shock
  B) both the a.c. and d.c. sources can be used
  C) the appliances are maintained at a higher pd than the earth
  D) the appliances are maintained at a lower pd than the earth
  Show Answer
  The correct answer is A .
• Question 800: Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same Options:
  A) Momentum
  B) Kinetic energy
  C) Potential energy
  D) Acceleration
  Show Answer
  The correct answer is C .