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 581:

  The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10${}^{-3}$ sin (500t - 0.025x). Determine the angular velocityof the wave motion.

  Options:
  A) 0.25 x 10${}^{-3}$rads${}^{-1}$
  B) 0.25 x 10${}^{-1}$rads${}^{-1}$
  C) 5.00 x 10${}^2$rads${}^{-1}$
  D) 2.50 x 10${}^3$rads${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 582: Natural radioactivity is the random spontaneous disintegration of the nuclei of heavy isotopes of certain elements with the emission of Options:
  A) $\alpha$, X, and $\beta$
  B) $\alpha$, $\beta$ and $\gamma$-rays
  C) X, $\alpha$, $\gamma$-ray
  D) $\alpha$, $\beta$ and X-rays
  Show Answer
  The correct answer is B .
• Question 583: When a transformer has more secondary windings than primary windings, it Options:
  A) has a smaller secondary current
  B) has a greater power output
  C) is a step-down transformer
  D) increases the total energy output
  Show Answer
  The correct answer is C .
• Question 584:

  

  In the figure above if the atmospheric pressure is 760mm, the pressure of the chamber G is

  Options:
  A) 660mm
  B) 690mm
  C) 830mm
  D) 860mm
  Show Answer
  The correct answer is C .
• Question 585: The particle nature of light is demonstrated by the Options:
  A) photoelectric effect
  B) speed of light
  C) colours of light
  D) diffraction of light
  Show Answer
  The correct answer is A .
• Question 586: 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) N0.13
  C) N3.90
  D) N39.00
  E) N234.00
  Show Answer
  The correct answer is B .
• Question 587: Calculate the magnitude of the force required to just move a 20kg object along a horizontal surface if the coefficient of friction is 0.2. [g = 10ms^-2] Options:
  A) 400.0N
  B) 40.0N
  C) 4.0N
  D) 0.4N
  Show Answer
  The correct answer is B .
• Question 588:

  

  What is the total resistance in the above diagram

  Options:
  A) 5 ohms
  B) 15 ohms
  C) 25 ohms
  D) 35 ohms
  E) 45 ohms
  Show Answer
  The correct answer is C .
• Question 589: Calculate the magnitude of the force required to just move a 20kg object along a horizontal surface if the coefficient of friction is 0.2. [g = 10ms^-2] Options:
  A) 400.0N
  B) 40.0N
  C) 4.0N
  D) 0.4N
  Show Answer
  The correct answer is B .
• Question 590:

  A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is

  Options:
  A) 5 volts
  B) 10 volts
  C) 15 volts
  D) 20 volts
  Show Answer
  The correct answer is B .