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 1721: The unit of moment of a couple can be expressed in? Options:
  A) N m^-1
  B) N m^-2
  C) N m
  D) N m²
  Show Answer
  The correct answer is C .
• Question 1722: A hydrometer is an instrument for measuring the Options:
  A) depth of water in a vessel
  B) relative density of a liquid by the method of flotation
  C) relative dendity of a liquid by finding the apparent loss in weight
  D) relative humidity of the air
  E) atmospheric pressure when the air is humid
  Show Answer
  The correct answer is B .
• Question 1723: Which of the following methods CANNOT be used to produce a steel magnet? The Options:
  A) passing of an electric current through a solenoid
  B) repeated stroking of the specimen with a magnet
  C) repeated stroking of the specimen in opposite directions with magnets
  D) heating of the specimen
  E) hammering of the specimen in the earth's magnetic field
  Show Answer
  The correct answer is D .
• Question 1724:

  Convex mirrors are used as driving mirrors because images formed are

  Options:
  A) erect, Virtual and diminished
  B) erect, real and diminished
  C) erect, virtual and magnified
  D) inverted, virtual and diminished
  Show Answer
  The correct answer is A .
• Question 1725: A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the center of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is Options:
  A) 15N
  B) 20N
  C) 30N
  D) 60N
  Show Answer
  The correct answer is B .
• Question 1726: An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood? Options:
  A) 0.10N
  B) 0.36N
  C) 0.80N
  D) 1.00N
  E) 3.60N
  Show Answer
  The correct answer is D .
• Question 1727: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 1728: The spiral spring of a spring balance is 25.0cm long when 5N hangs on it and 30cm long, when the weight is 10N. What is the length of the spring if the weight is 3N assuming Hooke's law is obeyed? Options:
  A) 15.0cm
  B) 17.0cm
  C) 20.0cm
  D) 23.0cm
  Show Answer
  The correct answer is D .
• Question 1729: Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance is Options:
  A) 0.25
  B) 0.50
  C) 1.00
  D) 2.20
  E) 4.00
  Show Answer
  The correct answer is A .
• Question 1730: The following are the scores of ten students in a test of 20 marks: 15, 16, 17, 13, 16, 8, 5, 16, 19, 17. What is the modal? Options:
  A) 13
  B) 15
  C) 16
  D) 19
  Show Answer
  The correct answer is C .