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 1171:

  How much work is done against the gravitational force on a 3.0 kg object when it is carried from the ground floor to the roof of a building, a vertical climb of 240 m?

  Options:
  A) 7.2 kJ
  B) 4.6 kJ
  C) 6.8 kJ
  D) 8.4 kJ
  Show Answer
  The correct answer is A .
• Question 1172: Which of the following statements are correct about an object in equilibrium under parallel forces? i. the total clockwise moments of the forces about any point equals the total anti-clockwise moments about the same point. ii. the total forces in one direction equals the total forces in the opposite direction. iii. the resolved components along the x-axis equals the resolved components along the y-axis. Options:
  A) i and ii only
  B) i and iii only
  C) ii and iii
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .
• Question 1173:

  A copper rod, 5m long when heated through 20c, expands by 1mm. If a second copper rod, 2.5m long is heated through 5c, by how much will it expand?

  Options:
  A) 4mm
  B) 2mm
  C) 0.25mm
  D) 0.12mm
  Show Answer
  The correct answer is B .
• Question 1174: Which of the following operations can be used to convert an alternative current dynamo into a direct current dynamo Options:
  A) number of turns in the coil is increased
  B) strength of the field magnet is increased
  C) slip rings are replaced with split ring cummutator
  D) coil is wound on a soft iron armature
  Show Answer
  The correct answer is C .
• Question 1175:

  

  The diagram above is the heating curve for a solid QR is the

  Options:
  A) melting region
  B) boiling region
  C) sublimation region
  D) evaporating process
  Show Answer
  The correct answer is A .
• Question 1176: What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it Options:
  A) gives a blurred image
  B) corrects for chromatic aberration
  C) magnifies the image
  D) brings the image into a sharper focus
  Show Answer
  The correct answer is A .
• Question 1177:

  

  The diagram above shows two vectors at right angles to each other. The value of the resultant vector is

  Options:
  A) 14.0 N
  B) 10.0 N
  C) 12.0 N
  D) 13.0 N
  Show Answer
  The correct answer is B .
• Question 1178:

  Water shows anomalous behaviour

  Options:
  A) below 0^oC
  B) between 0^oC and 4^oC
  C) at exactly 4^oC
  D) between 4^oC and 100^oC
  E) above 100^oC
  Show Answer
  The correct answer is B .
• Question 1179:

  A simple pendulum, has a period of 5.77 seconds. When the pendulum is shortened by 3 m, the period is 4.60 seconds. Calculate the new length of the pendulum

  Options:
  A) 5.23 m
  B) 6.42 m
  C) 4.87 m
  D) 7.26 m
  Show Answer
  The correct answer is A .
• Question 1180:

  A binary operation $\otimes$ defined on the set of integers is such that m $\otimes$ n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

  Options:
  A) $\frac{-5}{4}$
  B) $\frac{-5}{6}$
  C) o
  D) 5
  Show Answer
  The correct answer is A .