Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

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 1171: What happens when a gas expands at constant temperature? Options:
  A) its pressure decreases
  B) the total momentum of its molecules remains constant
  C) its pressure decreases and the total momentum of its moleculees remains constant
  D) its pressure decreses and the total kinetic energy of its molecule decreases
  Show Answer
  The correct answer is A .
• Question 1172: What happens to a water pool on a day when the humidity of the air is very low? Options:
  A) Temperature decreases
  B) Slow evaporation
  C) Temperature increases
  D) Rapid evaporation
  Show Answer
  The correct answer is D .
• Question 1173: The pressure on the gas of constant gas thermometer at the ice point is 325mm of mercury and at the steam point is 875mm of mercury. Find the temperature when the pressure of the gas is 190mm of mercury Options:
  A) 30k
  B) 243k
  C) 300k
  D) 3003k
  Show Answer
  The correct answer is B .
• Question 1174: For the correction of myopic defects in the human eye we require Options:
  A) a convex lens
  B) a concave lens
  C) a combination of concave and convex lenses
  D) a prism
  E) a concave mirror
  Show Answer
  The correct answer is B .
• Question 1175: Two rays of light from a point below the surface of water are equally inclined to each other at 60^o in water. What is the angle between the rays when they emerge into air? (Take the refractive index of water to be $\frac{4}{3}$) Options:
  A) 41.8^o
  B) 44.1^o
  C) 60.0^o
  D) 83.6^o
  E) 120.0^o
  Show Answer
  The correct answer is D .
• Question 1176: A gas at pressure PN-m^-2 and temperature 27^oC is heated to 77^oC at constant volume. The new pressure is Options:
  A) 0.85 PN-m^-2
  B) 0.86 PN-m^-2
  C) 1.16 PN-m^-2
  D) 1.18 PN-m^-2
  E) 2.85 PN-m^-2
  Show Answer
  The correct answer is C .
• Question 1177:

  Which of the following statements is not true?

  Options:
  A) The mechanical advantage of a smooth inclined plane depends on the ratio of the length to the height of the plane.
  B) The efficiency of an inclined plane decreases as the slope increases.
  C) The effort required to push a given load up an inclined plane increases as the slope increases.
  D) As the slope of an inclined plane increases, the velocity ratio decreases.
  Show Answer
  The correct answer is A .
• Question 1178:

  The velocity y of a particle in a time t is given by the equation

  Y = 10 + 2t²

  Find the instantaneous acceleration after 5 seconds

  Options:
  A) 60 ms^-2
  B) 20 ms^-2
  C) 15 ms^-2
  D) 10 ms^-2
  Show Answer
  The correct answer is B .
• Question 1179:

  

  In the diagram above, the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static friction between the mass m1 and the table is

  Options:
  A) m1/m2
  B) m1g/m2
  C) m2/m1
  D) m2g/m1
  Show Answer
  The correct answer is C .
• Question 1180: Three 5 ohms resistors connected in parallel have a potential difference of 60v. applied across the combination. The current in each resistor is Options:
  A) 4A
  B) 36A
  C) 12A
  D) 24A
  E) 10A
  Show Answer
  The correct answer is C .