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 1141:

  

  In the diagram above, a rod 50 cm long of uniform cross-section is suspended horizontally on a fulcrum, F, by the action of two forces. What is the weight of the rod?

  Options:
  A) 40N
  B) 80N
  C) 120N
  D) 200N
  Show Answer
  The correct answer is B .
• Question 1142:

  The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?

  Options:
  A) hyperbola
  B) parabola
  C) curve
  D) straight line
  Show Answer
  The correct answer is D .
• Question 1143: The carbon-granules microphone works on the principle of change in Options:
  A) inductance
  B) resistance
  C) capacitance
  D) voltage
  Show Answer
  The correct answer is B .
• Question 1144: Three cells each of e.m.f. 1.5v and an internal resistance of 1.0$\mathrm{\Omega }$ are connected in parallel across a load resistance of 2.67$\mathrm{\Omega }$. Calculate the current in the load? Options:
  A) 0.26A
  B) 0.41A
  C) 0.50A
  D) 0.79A
  Show Answer
  The correct answer is C .
• Question 1145: Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33) Options:
  A) 36.9°
  B) 41.3°
  C) 48.8°
  D) 49.2°
  E) 51.4°
  Show Answer
  The correct answer is C .
• Question 1146: An object of mass 2 kg moves with a velocity of 10 ms¹ round at circle of radius 4 m. Calculate the centripetal force on the object Options:
  A) 25 N
  B) 100 N
  C) 50 N
  D) 40 N
  Show Answer
  The correct answer is C .
• Question 1147: The physical quantity that has the same dimensions as impulse is Options:
  A) energy
  B) momentum
  C) surface tension
  D) pressure
  Show Answer
  The correct answer is B .
• Question 1148: Which of the following instruments can be used to measure e.m.f. most accurately. Options:
  A) Ammeter
  B) Galvanometer
  C) Metre bridge
  D) Potentiometer
  E) Voltmeter
  Show Answer
  The correct answer is D .
• Question 1149: When the tension in a sonometer wire is doubled, the ratio of the new frequency to the initial frequency is Options:
  A) $\frac{1}{\sqrt{2}}$
  B) $\frac{1}{2}$
  C) $\sqrt{2}$
  D) 2
  Show Answer
  The correct answer is C .
• Question 1150: If a water pump at Kainji Dam is capable of lifting 1000kg of water through a vertical height of 10m in 10s, the power of the pump is [g = 10ms^-2] Options:
  A) 1.0kW
  B) 10.0kW
  C) 12.5kW
  D) 15.0kW
  E) 20.0kW
  Show Answer
  The correct answer is B .