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: The focal length of a concave mirror is 2.0cm. If an object is placed 8.0cm from it, the image is at Options:
  A) 2.7m
  B) 2.0m
  C) 2.3m
  D) 2.5m
  Show Answer
  The correct answer is A .
• Question 492: A projection lantern is used to give the image of a slide on a screen. If the image is 24 times as large as the slide and the screen is 72.0m from the projecting lens, what is the position of the slide from the lens? Options:
  A) 0.3m
  B) 3.0m
  C) 3.5m
  D) 4.0m
  Show Answer
  The correct answer is B .
• Question 493: During electrolysis, 2.0 g of a metal is deposited using a current of 0.5 A in 3 hours. The mass of the same metal which can be deposited using a current of 1.5 A in 1 hour is? Options:
  A) 1.0 g
  B) 0.5 g
  C) 3.0 g
  D) 2.0 g
  Show Answer
  The correct answer is D .
• Question 494: The particle and wave nature of matter are demonstrated in the equation Options:
  A) λ = ^hc/_E
  B) λ = ^h/_P
  C) λ = ^c/_f
  D) λ = 2 d sin θ
  Show Answer
  The correct answer is B .
• Question 495:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors 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 496: The action of blotting paper on ink is due to Options:
  A) diffusion
  B) osmosis
  C) capillarity
  D) surface tension
  Show Answer
  The correct answer is C .
• Question 497: Three electric cells each of e.m.f 1.5V and internal resistance of 1.0$\mathrm{\Omega }$ are connected in parallel across an external resistance of $\frac{2}{3}$$\mathrm{\Omega }$. Calculate the value of the current in the resistor Options:
  A) 0.5 A
  B) 0.9A
  C) 1.5A
  D) 4.5A
  Show Answer
  The correct answer is C .
• Question 498: Two resistors 5Ω and 10Ω are arranged first in series and later in parallel to a 24V source, the ratio of total power dissipated in the series and parallel arrangements respectively is Options:
  A) 5:3
  B) 1:50
  C) 50:1
  D) 3:5
  E) No Correct Option
  Show Answer
  The correct answer is E .
• Question 499:

  

  In the above fig, PQ and R are vectors, which of the following options, gives a correct relationship between the vectors

  Options:
  A) P = Q + R
  B) P = Q - R
  C) P = R - Q
  D) P + Q + R = O
  Show Answer
  The correct answer is A .
• Question 500: A platinum resistance thermometer records 3.0$\mathrm{\Omega }$ at 0^oC and 8.0$\mathrm{\Omega }$ at 100^oC. If it records 6.0$\mathrm{\Omega }$ in a certain environment, The temperature of the medium is Options:
  A) 80^oC
  B) 60^oC
  C) 50^oC
  D) 30^oC
  Show Answer
  The correct answer is B .