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 971: The best material for the core of the primary and secondary coils of an induction coil is Options:
  A) copper, because it has a good conductor of electricity
  B) steel, because it becomes magnetic and retains its magnetism for a long time
  C) rubber, because it is a good insulator and the user is prevented from shock
  D) soft iron, because it becomes magnetic but easily loses its magnetism
  E) glass, because it is transparent
  Show Answer
  The correct answer is D .
• Question 972: Which of the following is not an electromagnetic radiation? Options:
  A) x - ray
  B) Radio waves
  C) sunlight
  D) sound waves
  Show Answer
  The correct answer is D .
• Question 973: The iron core of an induction coil is made from bundles of wire so as to Options:
  A) minimize eddy-currents
  B) generate eddy-current
  C) prevent sparking at the contact breaker
  D) get the greatest posible secondary voltage
  Show Answer
  The correct answer is A .
• Question 974: The surfaces of conveyor belts are made rough so as to Options:
  A) protect them while carrying loads
  B) prevent the loads from slipping
  C) enable them to carry more load
  D) make them stronger
  Show Answer
  The correct answer is B .
• Question 975: A voltage supply of 12V r.m.s. and frequency 90Hz is connected to a 4 ω resistor. Calculate the peak value of the current Options:
  A) 48.8 A
  B) 30.0 A
  C) 27.5 A
  D) 4.2 A
  E) 3.0A
  Show Answer
  The correct answer is D .
• Question 976: If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire Options:
  A) 0.75 J
  B) 7.50 J
  C) 75.00 J
  D) 750.00 J
  Show Answer
  The correct answer is A .
• Question 977:

  A generator manufacturing company accidentally made an AC generator instead of a DC generator. To fix this error,

  Options:
  A) the magnetic field needs to be made stronger
  B) the split rings should be replaced with slip rings
  C) the number of turns of the armature coil needs to be decreased
  D) the slip rings should be replaced with split rings
  Show Answer
  The correct answer is D .
• Question 978: Which of the following pairs is an example of translucent bodies? Options:
  A) Cardboard and moon
  B) Clear water and glass
  C) Frosted glass and waxed paper
  D) Oiled paper and brick
  E) Wood and metal sheet
  Show Answer
  The correct answer is C .
• Question 979: If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is Options:
  A) 10cm
  B) 15cm
  C) 16cm
  D) 19cm
  E) 20cm
  Show Answer
  The correct answer is B .
• Question 980: One of the following readings represents the measurement of the length of a metal rod using vernier callipers, Taking the reading accuracy into consideration, the most likely one is Options:
  A) 5.15cm
  B) 5.165cm
  C) 5.0cm
  D) 5.160cm
  E) 5cm
  Show Answer
  The correct answer is A .