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 551: The maximum permissible current through a galvanometer G of internal resistance 10$\mathrm{\Omega }$ is 0.05A. A resistance R is used to convert G into a voltmeter with a maximum reading of 100V. Find the value of R and how it is connected to G Options:
  A) 20,000 ohms in parallel
  B) 19,990 ohms in series
  C) 1990 ohms in series
  D) 100 ohms in series
  Show Answer
  The correct answer is C .
• Question 552:

  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 553:

  

  What is the total resistance in the above diagram

  Options:
  A) 5 ohms
  B) 15 ohms
  C) 25 ohms
  D) 35 ohms
  E) 45 ohms
  Show Answer
  The correct answer is C .
• Question 554: A ray incident on a glass prism undergoes minimum deviation when the Options:
  A) incident angle is equal to the angle of refraction
  B) refraction angle equals 90^o
  C) incident angle equals 90^o
  D) incident angle is equal to the angle of emergence
  Show Answer
  The correct answer is D .
• Question 555:

  

  What is the acceleration of a particle whose motion is graphically displayed in the diagram above

  Options:
  A) 0.67ms^-2
  B) 0.80ms^-2
  C) 0.87ms^-2
  D) 0.92ms^-2
  E) 0.20ms^-2
  Show Answer
  The correct answer is B .
• Question 556: The instrument used to measure the pressure of a gas is Options:
  A) barometer
  B) thermometer
  C) hygrometer
  D) manometer
  Show Answer
  The correct answer is D .
• Question 557:

  The linear expansivityof brass is 2 x 10${}^{-5}$ ${}^o{C}^{-1}$. If the volume of piece of brass is 10cm${}^3$ at 0${}^o$C. What will be its volume at 100${}^o$C?

  Options:
  A) 10.06cm${}^3$
  B) 10.04 cm${}^3$
  C) 10.02 cm${}^3$
  D) 10.20 cm${}^3$
  Show Answer
  The correct answer is A .
• Question 558: If the Nigeria flag (green, white, green) is viewed in pure yellow light, which of the following set of colours would be observed on the flag? Options:
  A) Green, yellow, green
  B) Red, yellow, red
  C) black, yellow, black
  D) Green, white, green
  Show Answer
  The correct answer is A .
• Question 559:

  A 40KW electric cable was uses to transmit electricity through a resistor of resistance 2.00Ω at 800V. The power loss as internal energy is

  Options:
  A) 4.0 x 10²W
  B) 5.0 x 10²W
  C) 4.0 x 10³W
  D) 5.0 x 10³W
  Show Answer
  The correct answer is D .
• Question 560:

  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 .