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 311: The volume of an air bubble increases from the bottom to the top of a lake at constant temperature because Options:
  A) atmospheric pressure acts on the surface of the lake
  B) pressure increases with depth
  C) density remains constant with pressure
  D) the bubble experiences an upthrust
  Show Answer
  The correct answer is B .
• Question 312: If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys Options:
  A) Graham's Law
  B) Boyle's Law
  C) Pressure law
  D) Charles Law
  E) No Correct Option
  Show Answer
  The correct answer is B .
• Question 313: The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is Options:
  A) 0.5 $\mathrm{\Omega }$
  B) 1.0$\mathrm{\Omega }$
  C) 2.0$\mathrm{\Omega }$
  D) 4.0$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 314: To protect a material from the influnce of an external magnetic field, the materials should be kept Options:
  A) square steel ring
  B) triangular zinc ring
  C) soft iron ring
  D) loop of copper wire
  Show Answer
  The correct answer is C .
• Question 315: It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus? Options:
  A) an electron
  B) a $\beta$-particle
  C) an $\alpha$-particle
  D) a proton
  E) an atom
  Show Answer
  The correct answer is D .
• Question 316: What are the units of thermal conductivity? Options:
  A) kg.m.sec²
  B) Joule sec^-1m^-1k^-1
  C) kg.m
  D) Newton sec^-1m²
  E) m³
  Show Answer
  The correct answer is B .
• Question 317:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 318: 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 .
• Question 319:

  

  A body on the ground is acted on by a force of 10N at a point P as shown in the fig above. What force is needed to stop the body from moving eastwards

  Options:
  A) 5N in the direction of east
  B) 5N in the diretion of west
  C) 5V3N in the direction of west
  D) 10N in the southwest direction
  Show Answer
  The correct answer is B .
• Question 320:

  

  Fig 8 shows a current I flowing in a copper wire situated in a magnetic field existing between the pole-pieces of a horse-shoe magnet.

  Which of the following statements is correct?

  Options:
  A) The wire will experience a force in the direction into the paper
  B) The wire will experience a force in the direction out of the paper
  C) The wire will vibrate in a direction into and out of the paper
  D) the wire will move in the direction of the field i.e toward the s-pole
  E) the wire will not move because it is made of copper which is non magnetic
  Show Answer
  The correct answer is B .