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 341: According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased? Options:
  A) a decrease in the mean speed kinetic energy of the molecules
  B) an increase in the mean speed of the molecules
  C) an increase in the momentum change at each collision.
  D) an increase in the number of collisions per second
  E) an increase in the pressure exerted by the gas.
  Show Answer
  The correct answer is A.
• Question 342: What is stored by a dry Leclanhé cell? Options:
  A) chemical energy
  B) heat energy
  C) mechanical energy
  D) nuclear energy
  E) solar energy
  Show Answer
  The correct answer is A.
• Question 343: Lenz’s law of electromagnetic induction states that Options:
  A) e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
  B) the induced e.m.f. in a circuit is proportional to the rate of change f the number of lines of force linking the circuit
  C) the induced current in a conductor is in such a direction as to oppose the change producing it
  D) a force is exerted in a current-carrying conductor in a magnetic field.
  E) the induced e.m.f. is proportional to the current producing the magnetic flux.
  Show Answer
  The correct answer is C.
• Question 344: Which process will increase the rate of oscillation of a pendulum? Options:
  A) decreasing the amplitude of oscillation of the pendulum
  B) decreasing the length of the pendulum
  C) decreasing the mass of the pendulum
  D) increasing the length of the pendulum
  E) increasing the mass of the pendulum.
  Show Answer
  The correct answer is B.
• Question 345: When a current of 1 .0A flows in an electrolyte for 3.0h, a mass of 1 .0g is deposited. What mass will be deposited in 10.0h if a current of 3.0A flows through the electrolyte? Options:
  A) 30.0g
  B) 24.0g
  C) 10.0g
  D) 6.0g
  E) 0.4g
  Show Answer
  The correct answer is B.
• Question 346: An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood? Options:
  A) 0.10N
  B) 0.36N
  C) 0.80N
  D) 1.00N
  E) 3.60N
  Show Answer
  The correct answer is D.
• Question 347: If the refractive index of water is 1.33, what is the critical angle for a water-air boundary? Options:
  A) 36.0 °
  B) 40.2 °
  C) 41.8 °
  D) 48.8 °
  E) 62.7 °
  Show Answer
  The correct answer is D.
• Question 348: What does NOT affect the rate of evaporation of a liquid Options:
  A) exposed surface area of the liquid
  B) humidity of the surroundings
  C) nature of the liquid
  D) temperature the liquid
  E) volume of the liquid.
  Show Answer
  The correct answer is E.
• Question 349: The use of electrical fuses in domestic wiring is Options:
  A) to prevent and electrical shock
  B) to supply electricity to all the electrical appliances
  C) to allow electricity to flow easily through the mains to all the circuits
  D) to cut off the mains supply it too high a current flows
  E) to fuse all the circuit into one
  Show Answer
  The correct answer is D.
• Question 350: Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element? Options:
  A) Alpha rays
  B) Gamma rays
  C) Positive rays
  D) Ultraviolet rays
  E) X-rays
  Show Answer
  The correct answer is E.