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 171: A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N? Options:
  A) N90
  B) N50
  C) N45
  D) N5
  Show Answer
  The correct answer is C .
• Question 172: The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is Options:
  A) 1:80
  B) 1:320
  C) 1:1280
  D) 1:4
  Show Answer
  The correct answer is A .
• Question 173:

  A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are

  Options:
  A) 0${}^o$ and 0${}^o$
  B) 60${}^o$ and 60${}^o$
  C) 90${}^o$ and 90${}^o$
  D) 90${}^o$ and 0${}^o$
  Show Answer
  The correct answer is D .
• Question 174: One valid assumption of the kinetic theory of gasses is the Options:
  A) the molecules of a gas are constantly in a state of motion and the number of collision remains constant
  B) the number of molecule of gas increases with increasing pressure
  C) as the temperature increases, the number of collision made by the gas molecule remains constant
  D) the molecules of gas are all identical and are very small in size
  Show Answer
  The correct answer is D .
• Question 175:

  ${}_{13}^{27}Al$ + ${}_0^{1}n$ $\Rightarrow$ ${}_{11}^{24}Na$ + X

  Options:
  A) a proton
  B) a gamma ray
  C) a helium particle
  D) an alpha particle
  Show Answer
  The correct answer is D .
• Question 176: A body of mass 100g moving with a velocity of 10.0ms^-1 collides with a wall. If after collision, it moves with a velocity of 2.0ms^-1 in the opposite direction, calculate the change in momentum. Options:
  A) 0.8Ns
  B) 1.2Ns
  C) 12.0Ns
  D) 80.0Ns
  Show Answer
  The correct answer is B .
• Question 177: If the distance between two point charges its increased by a factor of four, the magnitude of the electrostatic force between them will be Options:
  A) ¹/₄ of its former value
  B) ¹/₁₆ of its former value
  C) ¹/₂ of its former value
  D) 4 times its former value
  Show Answer
  The correct answer is B .
• Question 178: A moving coil galvanometer has a full-scale deflection of 3A equivalent to 30^o deflection. The sensitivity of the instrument is Options:
  A) 33.0
  B) 0.1
  C) 90.0
  D) 10.0
  Show Answer
  The correct answer is D .
• Question 179:

  

  In a light experiment with a convex lens a student plotted a graph as shown above of the reciprocal of object distance (1)/u against the reciprocal of image distance (1)/v . the focal length of the lens is given as

  Options:
  A) slope of line PQ
  B) Reciprocal of either OP or OQ
  C) Length OP or OQ
  D) area under the graph E ratio OP/OQ
  Show Answer
  The correct answer is B .
• Question 180:

  

  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 .