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 451: The half-life of a radioactive substance is 2 seconds. Calculate the decay constant Options:
  A) 0.035s^-1
  B) 0.151s^-1
  C) 0.347s^-1
  D) 0.576s^-1
  E) 1.386s^-1
  Show Answer
  The correct answer is C .
• Question 452: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 453: Which of the following devices may be used to step up the voltage in a d.c. circuit? Options:
  A) a step-up transformer
  B) a d.c. generator
  C) a wattmeter
  D) an induction coil
  Show Answer
  The correct answer is B .
• Question 454:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 455:

  A sonometer wire is vibrating at frequency f_o. If the tension in the wire is doubted while the length and the mass per unit length are kept constant, the new frequency of vibration is

  Options:
  A) ^f_o/₂
  B) 2f_o
  C) ^f_o/_√2
  D) f_o√2
  Show Answer
  The correct answer is D .
• Question 456: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 457:

  The equilibrium position of objects in any field corresponds to situation of

  Options:
  A) equipotential energy
  B) maximum potential energy
  C) minimum potential energy
  D) maximum kinetic energy
  Show Answer
  The correct answer is C .
• Question 458:

  

  In the circuit diagram above , the ammeter reads a current of 3A when R is 5Ω and 6A when R is 2Ω. Determine the value of x.

  Options:
  A) 8Ω
  B) 2Ω
  C) 10Ω
  D) 4Ω
  Show Answer
  The correct answer is C .
• Question 459: A ray of light is incident on an equilateral triangular glass prism of refractive index 3/2, Calculate the angle through which the ray is minimally deviated in the prism Options:
  A) 30.0${}^{\circ }$
  B) 37.2${}^{\circ }$
  C) 42.0${}^{\circ }$
  D) 48.6${}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 460: The spectrum of white light consists of coloured lights arranged in the following order Options:
  A) blue, red, green, yellow, indigo, violet, orange
  B) red, orange, yellow, green, blue, indigo, violet
  C) red, orange, yellow, indigo, green, blue, violet
  D) indigo, green, blue, violet, yellow, red, orange
  E) yellow, blue, green, violet, orange, indigo, red
  Show Answer
  The correct answer is B .