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 161: An effort P applied at one end of a crowbar just overcomes the resistance W at the lid of a tin. The mechanical advantage of the crowbar is expressed as Options:
  A) W + P
  B) P - W
  C) $\frac{w}{p}$
  D) $\frac{p}{w}$
  E) wp
  Show Answer
  The correct answer is C.
• Question 162: The phenomenon of photoelectric effect is used in the following EXCEPT Options:
  A) automatic doors
  B) bugler alarm
  C) electric fire alarm
  D) sound production from film tracks
  E) television cameras
  Show Answer
  The correct answer is D.
• Question 163: Which of the following statements about water is NOT correct? Options:
  A) Pure water freezes at 0°C under normal pressure
  B) The volume of a given mass of water at 0° is less than its volume at 4°C
  C) Water boils at a definite temperature
  D) Water evaporates at all temperatures
  E) Water has its maximum density at 4°C
  Show Answer
  The correct answer is D.
• Question 164: A body accelerating will have a constant speed if it is Options:
  A) falling from a height
  B) in equilibrium
  C) moving in a circular path
  D) moving in a straight line
  E) oscillating
  Show Answer
  The correct answer is C.
• Question 165: A sound wave from a ship is received 8.4s later. What is the depth of the sea? [Speed of sound in water = 1500ms^-1] Options:
  A) 0.179km
  B) 0.357km
  C) 3.150km
  D) 6.300km
  E) 12.600km
  Show Answer
  The correct answer is D.
• Question 166: Which of the following statements about a gas is NOT correct? Options:
  A) It has no definite shape
  B) It is compressible
  C) Its molecules are closely packed
  D) Its molecules gain kinetic energy when heated
  E) Its molecules move about randomly
  Show Answer
  The correct answer is C.
• Question 167: A body executing simple harmonic motion has an angular speed of 2π radians. Its period of oscillation is (π 3.14). Options:
  A) 0.05s
  B) 1.00s
  C) 2.00s
  D) 3.14s
  E) 6.28s
  Show Answer
  The correct answer is B.
• Question 168: An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jkg^-1K^-1) Options:
  A) 84s
  B) 112s
  C) 130s
  D) 168s
  E) 280s
  Show Answer
  The correct answer is A.
• Question 169: The equation P^xV^yT^z = Constant is Charles’ law if Options:
  A) x = 0, y = 1 and z = -1
  B) x = 0, y = -1 and z = 1
  C) x = 1, y = 1 and z = 0
  D) x = 1, y = 1 and z = -1
  E) x = 1, y = 1 and z = 1
  Show Answer
  The correct answer is A.
• Question 170: When a resistor of resistance R is connected across a.c. the terminal p.d. of the cell is reduced to three-quart its e.m.f. The cell’s internal resistance in terms of R is Options:
  A) $\frac{R}{4}$
  B) $\frac{R}{3}$
  C) $\frac{R}{2}$
  D) 2$\frac{R}{3}$
  E) R
  Show Answer
  The correct answer is A.