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 651:

  

  The net capacitance in the circuit above is

  Options:
  A) 80µF
  B) 6.0µF
  C) 4.0µF
  D) 2.0µF
  Show Answer
  The correct answer is D .
• Question 652: The hatch door of a submarine has an area of 0.5m². The specific gravity of sea water is 1.03. Assume that g = 10ms^-1,and neglect the atmospheric pressure. The force exerted by the sea water on the hatch door at a depth of 200m is Options:
  A) 1.03 x 10⁵N
  B) 1.03 x 10⁴Nm^-2
  C) 1.06 x 10⁵Nm^-2
  D) 2.06 x 10⁶N
  E) 1.03 x 10³N
  Show Answer
  The correct answer is E .
• Question 653: On top of a spiral spring of the force constant 500Nm^-1 is placed a mass of 5 x 10^-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected Options:
  A) 8 m
  B) 4 m
  C) 2 m
  D) 1 m
  Show Answer
  The correct answer is C .
• Question 654: A parachute attains a terminal velocity when Options:
  A) its density is equal to the density of air
  B) the viscous force of the air and the upthrust completely counteract its weight
  C) it expands as a result of reduced external pressure
  D) the viscous force of the air is equal to the sum of the weight and upthrust
  Show Answer
  The correct answer is B .
• Question 655: The phenomenon of light bending round an obstacle is? Options:
  A) diffraction
  B) refraction
  C) reflection
  D) polarization
  Show Answer
  The correct answer is A .
• Question 656: The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is Options:
  A) 0.5 $\mathrm{\Omega }$
  B) 1.0$\mathrm{\Omega }$
  C) 2.0$\mathrm{\Omega }$
  D) 4.0$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 657: A solid weighs 4.8g in air, 2.8g in water and 3.2g in kerosine. The ratio of density of the solid to that of the kerosine is Options:
  A) 12
  B) 3
  C) 2
  D) $\frac{3}{2}$
  E) $\frac{5}{4}$
  Show Answer
  The correct answer is B .
• Question 658:

  A mass of 0.5kg is whirled in a vertical circle of radius 2m at a steady rate of 2 rev/s. Calculate the centripetal force

  Options:
  A) 164N
  B) 160N
  C) 158N
  D) 172N
  Show Answer
  The correct answer is B .
• Question 659: Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV Options:
  A) -9.20eV
  B) -8.20eV
  C) -2.75eV
  D) -1.75eV
  Show Answer
  The correct answer is C .
• Question 660: The speed of light in vacuum is 3.0 x 10⁸ms^-1. If the refractive index of a transparent liquid is $\frac{4}{3}$, then the speed of light in the liquid is Options:
  A) 0.44 x 10 ⁸ms^-1
  B) 2.25 x 10 ⁸ms^-1
  C) 3.0 x 10 ⁸ms^-1
  D) 4.0 x 10 ⁸ms^-1
  E) 4.33 x 10 ⁸ms^-1
  Show Answer
  The correct answer is B .