NECO Physics Exam Past Questions and Answers

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 381: An electron of charge a = 1.6 × 10^-19C is situated in a uniform electric field of intensity 2.4 × 105 V m^-1. What is the force on the electron? Options:
  A) 1.60 × 10^-19N
  B) 3.84 × 10¹⁹N
  C) 1.92 × 10^-14N
  D) 3.84 × 10^-14N
  E) 7.68 × 10^-14N
  Show Answer
  The correct answer is D.
• Question 382: Which is NOT one of the laws of solid friction? Options:
  A) The frictional force between two surfaces opposes their relative motion
  B) The ratio of frictional force to the normal reaction varies for two given surfaces
  C) The ratio of frictional force to the normal reaction is constant for two given surfaces
  D) The limiting frictional force is independent of the area of surface in contact.
  E) Dynamic frictional force is independent of the relative velocity of the surfaces in contact.
  Show Answer
  The correct answer is B.
• Question 383: Given the same amount of beat, a quantity of water will reach a higher temperature in a brass pot than in a clay pot of the same mass because Options:
  A) brass is less dense than clay
  B) clay expands more slowly than brass
  C) clay loses heat faster than brass
  D) the specific heat capacity of brass is higher than that of clay
  E) the specific heat capacity of brass is lower than of clay.
  Show Answer
  The correct answer is E.
• Question 384: 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.
• Question 385: An object 3.00m high is placed at a distance of 7.50m from a pin-hole camera. If the image height is 6.00 cm, what is the distance of the film from the pin-hole? Options:
  A) 3.75cm
  B) 7.50cm
  C) 15.00cm
  D) 30.00cm
  E) 150.00 cm
  Show Answer
  The correct answer is C.
• Question 386: The falling of light energy on a metal such that electrons are liberated from the metal is called Options:
  A) electron effect
  B) metal electron effect
  C) metal emission
  D) photoelectric effect
  E) photoemission
  Show Answer
  The correct answer is E.
• Question 387: The speed of sound travelling in various media increases in the order: Options:
  A) air, iron bar, water
  B) air, water, iron bar
  C) iron, bar water, air
  D) water, air, iron bar
  E) water, iron bar, air
  Show Answer
  The correct answer is B.
• Question 388: If N.E.P.A. charges 65 kobo per kilowatt-hour for electricity supplied to consumers, what bill would an electric iron rated at 750 watts attract when used for 24 hours? Options:
  A) N9.70
  B) N11.70
  C) N12.40
  D) N15.90
  E) N17.60
  Show Answer
  The correct answer is B.
• Question 389: An object is placed 15cm in front of a concave mirror of focal length 20cm. The image formed is Options:
  A) real, inverted and diminished
  B) real, inverted and magnified
  C) virtual, erect and diminished
  D) virtual, erect and magnified
  E) virtual, inverted and magnified
  Show Answer
  The correct answer is D.
• Question 390: Which material is best for making a permanent magnet? Options:
  A) aluminium
  B) cobalt
  C) copper
  D) soft iron
  E) steel
  Show Answer
  The correct answer is E.