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 2421: A galvanometer of internal resistance 50$\mathrm{\Omega }$ has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V? Options:
  A) 1750$\mathrm{\Omega }$
  B) 1950$\mathrm{\Omega }$
  C) 2000$\mathrm{\Omega }$
  D) 2500$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 2422: The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by Options:
  A) convection
  B) radiation from the surface
  C) conduction through the stopper and the glass
  D) conduction across the walls
  Show Answer
  The correct answer is C .
• Question 2423:
  

  The effect of closing the key K in the circuit shown in the figure above would be to?

  Options:
  A) increase the current by 0.4A
  B) reduce the current by 0.4A
  C) increase the current by 0.6A
  D) reduce the current by 0.6A
  Show Answer
  The correct answer is A .
• Question 2424: A parachute attains a terminal velocity when Options:
  A) its density is equal to the density of air
  B) the viscous force of the air and the upthrust completely counteract its weight
  C) it expands as a result of reduced external pressure
  D) the viscous force of the air is equal to the sum of the weight and upthrust
  Show Answer
  The correct answer is B .
• Question 2425:

  I. A liquid boils when its saturated vapour pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decrease the boiling point.

  Which combination of the above are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III
  B) I, II, III and IV
  C) I, II and IV
  D) II, III and IV
  Show Answer
  The correct answer is A .
• Question 2426:

  When the breaks in a car are applied, the frictional force on the tyresis?

  Options:
  A) a disadvantage because it is in the direction of the motion of the car
  B) a disadvantage because it is in the opposite direction of the motion of the car
  C) an advantage because it is in the direction of the motion of the car
  D) an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 2427:

  The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?

  Options:
  A) hyperbola
  B) parabola
  C) curve
  D) straight line
  Show Answer
  The correct answer is D .
• Question 2428: The thermos flask is designed to? Options:
  A) prevent heat loss or gain by conduction, convection amd radiation
  B) store hot tea or water
  C) prevent heat gain by conduction, convection and radiation
  D) prevent head lost conduction, convention and radiation
  Show Answer
  The correct answer is A .
• Question 2429:

  The refractive index of a liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10${}^{8}m{s}^{-1}$, the velocity of light in the liquid is

  Options:
  A) 1.5 x 10${}^{8}m{s}^{-1}$
  B) 2.0 x 10${}^{8}m{s}^{-1}$
  C) 3.0 x 10${}^{8}m{s}^{-1}$
  D) 4.5 x 10${}^{8}m{s}^{-1}$
  Show Answer
  The correct answer is B .
• Question 2430: The water at the bottom of a waterfall is slightly warmer than that at the top because part of the Options:
  A) potential energy raises the water temperature
  B) water absorbs latent heat from the atmosphere
  C) kinetic energy is changed intyo internal energy
  D) dropping mass of water increases the heat capacity
  E) A and C above
  Show Answer
  The correct answer is C .