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 311: What is the acceleration due to gravity 'g' on the moon, if g is 10^-2 on the earth? Options:
  A) 0. 10 ms^-2
  B) 0.74ms^-2
  C) 1.6ms^-2
  D) 10.00ms^-2
  Show Answer
  The correct answer is C .
• Question 312: If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material? Options:
  A) 24 years
  B) 20 years
  C) 10 years
  D) 2 years
  Show Answer
  The correct answer is B .
• Question 313:

  Particles of mass 10${}^{-2}$kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad${}^{-1}$. If the radius of the blade is 0.2m, the centripetalforce is?

  Options:
  A) 2N
  B) 20N
  C) 200N
  D) 400N
  Show Answer
  The correct answer is B .
• Question 314: If the pressure on 100cm³ of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become Options:
  A) 25cm³
  B) 50cm³
  C) 100cm³
  D) 200cm³
  E) 400cm³
  Show Answer
  The correct answer is A .
• Question 315: One of the features of the fission process is that Options:
  A) its products are not radioactive
  B) it leads to chain reaction
  C) neutrons are not released
  D) the sum of the masses of the reactants equals the sum of masses of the products
  Show Answer
  The correct answer is B .
• Question 316: Which of the following electromagnetic waves is least energetic? Options:
  A) Infra-red rays
  B) X-rays
  C) Ultra-violet rays
  D) Gamma rays
  Show Answer
  The correct answer is A .
• Question 317: If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is Options:
  A) 17cm
  B) 20cm
  C) 25cm
  D) 100cm
  Show Answer
  The correct answer is C .
• Question 318: If I is the current passing through a metallic resistor and H is the rate of Heat generated in the resistor at a constant temperature, then Options:
  A) H $\alpha$ $\frac{1}{I}$
  B) H $\alpha$ $\frac{1}{I^2}$
  C) H $\alpha$ $\sqrt{1}$
  D) H $\alpha$ I²
  E) none of the above
  Show Answer
  The correct answer is D .
• Question 319:

  

  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 320:

  

  The image above shows an inverted U-tube with the open end, O of one limb below the level, W of water in the tank, in order that water should begin to flow from the tank it is is necessary that

  Options:
  A) The U-tube is completely filled with water and that P should be higher that W
  B) P should be lower than O and W
  C) P should be lower than W and O should reach the botton of the table
  D) The U-tube is completely filled with water and that P should be lower that W
  Show Answer
  The correct answer is B .