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 391: A cell can supply currents of 0.60 A and 0.30 A through a 2.0 ω and a 5.0 ω resistor respectively. What is the internal resistance of the cell? Options:
  A) 0.2 ω
  B) 0.4 ω
  C) 1.0 ω
  D) 3.0 ω
  E) 9.0 ω
  Show Answer
  The correct answer is C.
• Question 392: Which statement is a correct consequence of the uncertainly principle? Options:
  A) A particle’s kinetic energy cannot be measured accurately at any time
  B) Both momemtum and energy of a particle can be known with absolute certainly
  C) It is possible to measure exactly both the position and momentum of a particle at the same time
  D) The complete knowledge of the position of a particle implies the complete ignorance of its energy
  E) The uncertainty in our knowledge of energy and the duration taken to measure it, are each less than Planck’s constant.
  Show Answer
  The correct answer is A.
• Question 393: A 220 V, 60 Hz alternating current supply is connected to an inductor of 3.5H. What is the current passing through the inductor? Options:
  A) 0.0167 A
  B) 0.1670 A
  C) 1.6700 A
  D) 16.7000 A
  E) 167.0000 A
  Show Answer
  The correct answer is B.
• Question 394: How much heat is required to convert 5.0g of ice at 0 ° C to water at the boiling point? (Specific latent heat of ice = 336Jg^-1 specific heat capacity of water = 4.2Jg^-1K^-1) Options:
  A) 420 J
  B) 1680 J
  C) 1701 J
  D) 2100 J
  E) 3780 J
  Show Answer
  The correct answer is E.
• Question 395: What gives rise to the line spectra observed in atoms? Options:
  A) change of an electron from a higher to a lower energy level in the atom
  B) disturbed protons in the nucleus
  C) excitation of an electron in the atom
  D) kinetic energy of a moving atom
  E) potential energy of an electron inside an atom
  Show Answer
  The correct answer is A.
• Question 396: A lead-acid accumulator is used in preference to a dry battery in a car because Options:
  A) a dry battery cannot supply the necessary high voltage
  B) a dry battery would not operate on a cold frosty morning
  C) the accumulator can give a bigger current and can be recharged
  D) the accumulator can supply a.c
  E) the chemicals used in a dry battery constitute a fire hazard.
  Show Answer
  The correct answer is C.
• Question 397: A metal has a work function of 3.0 eV. What is the threshold frequency of the metal when electrons are just liberated from the metal.(1 _eV = 1.6 × 10^-19J; h = 6.6 × 10^-34Js) Options:
  A) 4.8 × 10^-19Hz
  B) 9.3 × 10^-7Hz
  C) 4.8 × 10¹⁴Hz
  D) 7.3 × 10¹⁴Hz
  E) 9.3 × 10¹⁴Hz
  Show Answer
  The correct answer is D.
• Question 398: A body whose initial velocity is u is uniformly accelerated to a final velocity v in t seconds. If the distance travelled is s, and the acceleration is a, which equation is INCORRECT for the motion of the body? Options:
  A) s = ut+$\frac{1}{2}$at²
  B) v² = u² + 2as
  C) v =u + at
  D) v = u + 2as
  E) s = $\frac{1}{2}$(u+v)t
  Show Answer
  The correct answer is D.
• Question 399: An object placed 15cm from a converging lens forms a real image whose magnification is 2.0. What is the focal length of the lens? Options:
  A) 5.00cm
  B) 10.00cm
  C) 15.00 cm
  D) 18.00 cm
  E) 20.00cm
  Show Answer
  The correct answer is B.
• Question 400: Which statement about the concept of temperature is NOT true? Options:
  A) Temperature decides the direction of heat flow between two bodies
  B) Temperature is a measure of coldness of a body
  C) Temperature is a vector quantity
  D) Temperature is a measure of hotness of a body.
  E) Temperature scales include Fahrenheit, Celsius and Kelvin
  Show Answer
  The correct answer is C.