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 body is acted upon by forces applied at points P and Q as shown above their resultant is equal to

  Options:
  A) 2√5N in adirection N 56° E
  B) 2√5N in adirection N 56° W
  C) 2√13N in adirection N 56◦ E
  D) 2√13N in adirection N 56° W
  E) √10N in adirection N 56° E
  Show Answer
  The correct answer is C .
• Question 172: In copper plating, a current of 0.5A is allowed for cathode area of 100cm². If this current is maintained constant for 100 minutes, the thickness of the copper deposited will be approximately (the electrochemical equivalent of copper = 0.0003g/^oC, density of copper = 10^-4g/cm³ ) Options:
  A) 10^-2mm
  B) 10^-3mm
  C) 10^-4mm
  D) 10^-5mm
  E) 10^-6mm
  Show Answer
  The correct answer is E .
• Question 173: The small droplet of water that forms on the grass in the early hours of the morning is Options:
  A) hail
  B) dew
  C) fog
  D) mist
  Show Answer
  The correct answer is B .
• Question 174: Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror Options:
  A) 4. 0 cm
  B) 3. 0 cm
  C) 12.0 cm
  D) 9.0 cm
  Show Answer
  The correct answer is C .
• Question 175: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .
• Question 176:

  

  What is the resultant resistance of the circuit in the image shown?

  Options:
  A) 8Ω
  B) 11Ω
  C) 4Ω
  D) 3.6Ω
  Show Answer
  The correct answer is A .
• Question 177: when a piece of rectangular glass block is inserted between two parallel capacitor,at constant plate area and distance of separation, the capacitance of the capacitor will Options:
  A) increase
  B) decrease
  C) decrease then increase
  D) remain constant
  Show Answer
  The correct answer is A .
• Question 178:

  Which of the following is an example of a couple?

  Options:
  A) All of the above.
  B) The forces that are applied to the handle of a screwdriver when you twist it.
  C) The forces that are applied to a cross wench to loosen or tighten the lug nuts on a wheel of a car.
  D) The forces that are applied to the steering wheel of a car when you turn it.
  Show Answer
  The correct answer is A .
• Question 179: Neutron were discovered by Options:
  A) J.J. Thompson
  B) James Chadwick
  C) Michael faraday
  D) Dalton
  Show Answer
  The correct answer is B .
• Question 180: The main function of the commutator in a simple d.c. motor is to Options:
  A) enable the armature to rotate freely
  B) increase the flux linking the armature windings
  C) maintain a direct current in the armature
  D) provide uniform magnetic field around the armature
  E) reverse the direction of the current in the armature.
  Show Answer
  The correct answer is E .