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 1141:

  

  In the figure above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

  Options:
  A) both M and N have acquired negative charges
  B) both M and N have acquired positive charges
  C) M has acquired negative charge and N positive charge
  D) N has acquired negative charge and M positive charge
  Show Answer
  The correct answer is D .
• Question 1142: A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms ^-1, how much closer is the ship to the cliff? Options:
  A) 10m
  B) 125m
  C) 175m
  D) 350m
  E) 1,000m
  Show Answer
  The correct answer is B .
• Question 1143: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 1144: The pressure of a given mass of a gas changes from 200Nm^-2 to 120Nm^-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is Options:
  A) 2 : 5
  B) 5 : 4
  C) 5 : 2
  D) 4 : 5
  Show Answer
  The correct answer is B .
• Question 1145:

  Which of the following may be used to determine the relative humidity in a physics laboratory I. Manometer

  II. Wet-and-Dry Bulb Hygrometer

  III. Hair Hygrometer

  IV. A Hydrometer

  Options:
  A) I Only
  B) II and III Only
  C) II Only
  D) III Only
  E) II,IIIand IV Only
  Show Answer
  The correct answer is B .
• Question 1146:

  A binary operation $\otimes$ defined on the set of integers is such that m $\otimes$ n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

  Options:
  A) $\frac{-5}{4}$
  B) $\frac{-5}{6}$
  C) o
  D) 5
  Show Answer
  The correct answer is A .
• Question 1147:

  According to kinetic molecular model, in gases

  Options:
  A) The molecules are very fast apart and occupy all the space made available.
  B) The particles occur in clusters with molecules slightly farther apart.
  C) The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern.
  D) The particles vibrate about fixed positions and are held together by the strong inter-molecular bond between them.
  Show Answer
  The correct answer is A .
• Question 1148:

  An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 $P_a$, what is the absolute pressure in $P_a$ in the tank if the height of the mercury in the open tube is 25 cm higher. density of mercury = $13600kg/m^3,g=9.8m/s^2$

  Options:
  A) 108,986 Pa
  B) 165,238 Pa
  C) 122,364 Pa
  D) 134,645 Pa
  Show Answer
  The correct answer is D .
• Question 1149: In which of the following are the substances arranged in descending order of their thermal conductivities? Options:
  A) aluminium, copper, iron
  B) aluminium, iron, copper
  C) copper, aluminium, iron
  D) copper, iron. aluminium
  E) iron, copper, aluminium
  Show Answer
  The correct answer is D .
• Question 1150: Which of the following radiations cannot be deflected by a magnetic field? Options:
  A) $\alpha$
  B) $\beta$
  C) $\gamma$
  D) $\beta$ and $\gamma$
  E) none of them
  Show Answer
  The correct answer is C .