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 501: A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate his distance from the wall. (The speed of sound in air is 330ms^-1) Options:
  A) 600m
  B) 400m
  C) 330m
  D) 328m
  E) 165m
  Show Answer
  The correct answer is C.
• Question 502: A body moves along a circular path with uniform angular speed of 0.6 rad s^-1 and at a constant speed of 3.0ms^-1. Calculate the acceleration of the body towards the centre of the circle. Options:
  A) 25.0ms^-2
  B) 5.4 ms^-2
  C) 5.0ms^-2
  D) 1.8 ms^-2
  E) 0.2ms^-2
  Show Answer
  The correct answer is D.
• Question 503: Which of the following will reduce the frequency of oscillation of a simple pendulum? Options:
  A) Decreasing the length of the string
  B) Increasing the amplitude of oscillation
  C) Increasing the length of the string
  D) Increasing the mass of the bob
  E) Reducing the mass of the bob.
  Show Answer
  The correct answer is C.
• Question 504:

  Which of the following conclusion(s) can be drawn from Newton’s second law of motion? Force is proportional toI. the product of mass and acceleration

  II. the product of mass and velocity

  III. Impulse

  Options:
  A) I only
  B) II only
  C) III only
  D) II and III only
  E) I, II and III
  Show Answer
  The correct answer is E.
• Question 505:

  Which of the following statement(s) is/are correct about the isotopes of an elements? They have the same I. chemical properties

  II. nucleon number

  III proton number

  Options:
  A) I only
  B) II only
  C) I and II only
  D) I and III only
  E) I,II and III
  Show Answer
  The correct answer is D.
• Question 506: Lenz’s law of electromagnetic induction states that Options:
  A) a force is exerted on a current carrying conductor in a magnetic field
  B) the induced current in a conductor is in such a direction as to oppose the change producing it
  C) the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of the number of lines of force linking the circuit
  D) the magnitude of the induced electromotive force is proportional to the current producing the magnetic flux
  E) whenever there is a change in the magnetic flux linked with the circuit, an electromotive is induced
  Show Answer
  The correct answer is B.
• Question 507:

  A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time? I. Displacement

  II. Velocity

  III. Momentum

  Options:
  A) I only
  B) II only
  C) III only
  D) I and II only
  E) II and Ill only
  Show Answer
  The correct answer is A.
• Question 508: A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed. Which statement is correct? Options:
  A) The cap will be positively charged and the will be negatively charged
  B) The cap will be negatively charged and the leaf will be positively changed
  C) The cap and the leaf will be positively charged
  D) The cap and the leaf will be negatively charged
  E) none
  Show Answer
  The correct answer is D.
• Question 509: When an astronomical telescope is in normal adjustment, the focal length of the objective lens is 50cm and that of the eye piece is 5.0cm. What is the distance between the lenses? Options:
  A) 10.0cm
  B) 30.0cm
  C) 45.0cm
  D) 55.0cm
  E) 250.0cm
  Show Answer
  The correct answer is D.
• Question 510:

  Which statements(s) is/are NOT true?

  I. A saturated vapour is one that is in equilibrium with its liquid in a closed space.
  II. A vapour contains molecules with varying kinetic energy and their distances apart are smaller than those of the molecules of a liquid
  III. Relative Humidity = $\frac{\text{Saturated vapour pressure at dew point}}{\text{Saturated vapour pressure at air temperature}}$ x 100%
  IV. The saturated vapour pressure of water increases with temperature

  Options:
  A) I only
  B) II only
  C) II and III only
  D) III and IV only
  E) II, III and IV only
  Show Answer
  The correct answer is B.