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 1321: The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by Options:
  A) commutators
  B) transistors
  C) valves and diodes
  D) rectifiers
  E) transformers
  Show Answer
  The correct answer is E .
• Question 1322: Two inductors of inductances 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is Options:
  A) 500.0J
  B) 250.0J
  C) 62.5J
  D) 50.0J
  E) no correct option
  Show Answer
  The correct answer is E .
• Question 1323: A load of 20N on a wire of cross-sectional area 8 x 10^-7m², produces an extension of 10m². calculate Young's modulus for the material of the wire if its length is 3m Options:
  A) 7.0 x 10¹¹Nm^-2
  B) 7.5 x 10¹¹Nm^-2
  C) 8.5 x 10¹¹Nm^-2
  D) 9.0 x 10¹¹Nm^-2
  Show Answer
  The correct answer is B .
• Question 1324: The effect of a particle in a fluid attaining its terminal velocity is that the Options:
  A) acceleration is maximum
  B) weight is equal to the retarding force
  C) buoyancy force is equal to the to the viscous retardind force
  D) buoyancy force is more than the weight of the fluid displaced
  Show Answer
  The correct answer is B .
• Question 1325: When a box of mass 45kg, is given an initial speed of 5ms^-1 it slides along a horizontal floor a distance of 3m before coming to a rest. what is the coefficient of kinetic friction between the box and the floor? (G = 10ms^-2) Options:
  A) $\frac{5}{6}$
  B) $\frac{5}{12}$
  C) $\frac{1}{3}$
  D) $\frac{2}{3}$
  Show Answer
  The correct answer is B .
• Question 1326: The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is Options:
  A) t – n
  B) t (1 + 1/n)
  C) t (1-1/n)
  D) t (1/n - 1)
  Show Answer
  The correct answer is C .
• Question 1327:

  The linear expansivity of brass is 2 x 10${}^{-5}$ C${}^{-1}$. If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

  Options:
  A) 16.03cm${}^3$
  B) 15.09cm${}^3$
  C) 16.00cm${}^3$
  D) 15.03cm${}^3$
  Show Answer
  The correct answer is B .
• Question 1328:

  What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

  Options:
  A) N0.65
  B) N0.39
  C) N3.90
  D) N0.13
  Show Answer
  The correct answer is D .
• Question 1329: Which of the following is NOT a vector quantity? Options:
  A) altitude
  B) acceleration
  C) displacement
  D) weight
  Show Answer
  The correct answer is A .
• Question 1330: When an object is placed between the principal focus and the optical center of a convex lens, it could be used as a? Options:
  A) Simple microscope
  B) refecting lens
  C) compound microscope
  D) projector
  Show Answer
  The correct answer is A .