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 491: A gas at a volume of V₀ in a container at pressure P₀ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant? Options:
  A) P₀/5
  B) 4P₀/5
  C) P₀
  D) 5P₀
  Show Answer
  The correct answer is D .
• Question 492:

  When a girl moves towards a plane mirror at a speed of 4.0m/s, the distance between the girl and her image reduces a speed of

  Options:
  A) 2 m/s
  B) 4 m/s
  C) 8 m/s
  D) 12 m/s
  Show Answer
  The correct answer is C .
• Question 493: Which of the following ammeters may be used to measure alternating currents? i. moving-coil ammeter ii. moving-iron ammeter iii. hot-wire ammeter Options:
  A) i and ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii
  Show Answer
  The correct answer is D .
• Question 494: After three half lifes, the fraction of a radioactive material that has decayed is Options:
  A) $\frac{1}{8}$
  B) $\frac{1}{3}$
  C) $\frac{2}{3}$
  D) $\frac{7}{8}$
  Show Answer
  The correct answer is D .
• Question 495:

  

  In the Fig above, Current I passes through the combination, if the power dissipated in the 5 ohm resistor is 40W, then the power dissipated in the 10 ohm resistor is

  Options:
  A) 10W
  B) 20W
  C) 40W
  D) 80
  E) 100W
  Show Answer
  The correct answer is B .
• Question 496:

  A metal rod has a length of 100cm at 200${}^{o}C$. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is 2 $\times$ 10${}^{-5}{C}^{-1}$

  Options:
  A) 200${}^o$C
  B) 300${}^o$C
  C) 100${}^o$C
  D) -100${}^o$C
  Show Answer
  The correct answer is D .
• Question 497: in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor? Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 498: An equipment whose power is 1500W and resistance is 375 ohms would draw a current of Options:
  A) 0.10A
  B) 2.00A
  C) 4.00A
  D) 77.5A
  Show Answer
  The correct answer is B .
• Question 499:

  I. Jet propelled aircraft
  II. Rocket propulsion
  III. The recoil of a gun
  IV. A person walking

  Which of the above is based on Newton's third law of motion

  Options:
  A) I and II only
  B) I, II, III, and IV only
  C) I and III only
  D) I, II and III only
  Show Answer
  The correct answer is B .
• Question 500: Which of the following correctly, describes the image of an object, 4cm from a diverging lens of focal length 12cm? Options:
  A) The image is virtual, 3cm in front of the lens
  B) The image is real, 6cm behind the lens
  C) The image is virtual, 6cm in front of the lens
  D) The image is real, 3cm in front the lens
  Show Answer
  The correct answer is A .