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 261: The resultant of two forces P and Q is least when the angle between them is Options:
  A) 0°
  B) 45°
  C) 60°
  D) 90°
  E) 180°
  Show Answer
  The correct answer is E.
• Question 262: A ray of light experiences a minimum deviation when passing through an equilateral triangular glass prism. Calculate the angle of incidence of the ray. [Refractive index of glass = 1.5] Options:
  A) 300.0°
  B) 48.6°
  C) 60.0°
  D) 75.5°
  E) 105.0 °
  Show Answer
  The correct answer is B.
• Question 263: Calculate the energy stored in an inductor of inductance 0.5H when a current of 3A flows through it. Options:
  A) 15.00 J
  B) 9.45 J
  C) 6.00 J
  D) 4.50J
  E) 2.25 J
  Show Answer
  The correct answer is E.
• Question 264: The relative density of dilute tetraoxosulphate (vi) acid in a battery is measured with a Options:
  A) barometer
  B) hydrometer
  C) manometer
  D) hypsometer
  Show Answer
  The correct answer is B.
• Question 265: A resistor connected in parallel with a galvanometer so that a large amount of current can be measured is called a/an Options:
  A) ammeter
  B) avometer
  C) coil resistor
  D) multiplier
  E) shunt.
  Show Answer
  The correct answer is E.
• Question 266: A current flows in a series circuit containing a resistor, R, an inductor, L and a capacitor, C. Which of the following is true of the power dissipated in the circuit component(s)? Options:
  A) The power dissipated in L is greater than zero
  B) The power dissipated in R is zero
  C) The sum of the power dissipated in L and C is equal to that in R
  D) The sum of the power dissipated in L and C is greater than in R
  E) The sum of the power dissipated in L and C is zero
  Show Answer
  The correct answer is E.
• Question 267: Emission spectra are caused by Options:
  A) kinetic energy of moving atoms
  B) potential energy of an electron in an atom
  C) transition of an electron from a higher energy level to a lower energy level
  D) transition of an electron from a lower energy level to higher energy level
  E) transition of excited protons in the nucleus.
  Show Answer
  The correct answer is C.
• Question 268: Which of the following is used as a depolarizer in a Denial cell? Options:
  A) Ammonium chloride
  B) Copper (II) tetra Oxo sulphate (VI) solution
  C) Manganese (IV) oxide
  D) Tetraoxo sulphate (VI) acid
  E) Water
  Show Answer
  The correct answer is B.
• Question 269: A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days? Options:
  A) 9.766 × 10^-4
  B) 1.736 ×10^-3
  C) 1.953 ×10^-3
  D) 3.472 × 10^-3
  E) 3.906 x 10^-3
  Show Answer
  The correct answer is C.
• Question 270: If the distance between the plates of a parallel plate capacitor is decreased, its capacitance Options:
  A) becomes zero
  B) decreases
  C) increases
  D) is halved
  E) remains the same
  Show Answer
  The correct answer is C.