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 191: Two divers G and H are at depths 20m and 40m respectively below the water surface in a lake. The pressure on G is P₁ while the pressure on H is P₂. If the atmospheric pressure is equivalent to 10m of water, then the value of $\frac{p_2}{p_1}$ is Options:
  A) 0.50
  B) 0.60
  C) 1.67
  D) 2.00
  E) 3.0
  Show Answer
  The correct answer is D .
• Question 192: The factional force between two bodies Options:
  A) exists only when there is relative motion or tendency for motion
  B) acts so as to oppose the motion
  C) depends on the normal reaction between the two surfaces
  D) is relatively independent of the area in contact
  E) has all of these characteristics
  Show Answer
  The correct answer is E .
• Question 193: The heat produced in a conductor carrying an electric current is Options:
  A) inversely proportional to the current and the resistance
  B) directly proportional to the current, resistance and the time
  C) inversely proportional to of the resistance, current and the time
  D) directly proportional to the square of the current, the resistance and the time
  Show Answer
  The correct answer is D .
• Question 194: Which of the following statements is NOT correct? Options:
  A) The average range of distinct vision for a normal eye is from the far distance (infinity) up to about 25cm in front of the eye
  B) Longsighted people have difficulty in making the eye lense sufficiently powerful to focus on nearby objects
  C) Shortsighted people cannot accommodate distant objects
  D) Longsighted people need diverging spectacle lenses
  E) A person with long sight has his eye-ball too short and the image of an object is therefore formed behind the retina
  Show Answer
  The correct answer is D .
• Question 195: Heat losses to the surrounding is possible through the following except Options:
  A) Conduction
  B) Convection
  C) Radiation
  D) Expansion
  Show Answer
  The correct answer is D .
• Question 196: The ground is always cold at night because the Options:
  A) atmosphere absorbs the sun's energy at night
  B) earth radiates heat to the atmosphere at night
  C) sun no longer shine at night
  D) atmosphere reflects the sun's energy at night
  Show Answer
  The correct answer is B .
• Question 197: If negative charges are induced on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will Options:
  A) close up
  B) become positively charged
  C) become negatively charged
  D) open further
  Show Answer
  The correct answer is A .
• Question 198:

  The lead-acid accumulator consists of

  Options:
  A) lead as the positive electrode
  B) lead acid as the negative electrode
  C) hydrochloric acid as the electrolyte
  D) tetraoxosulphate (vi) acid as the electrolyte
  Show Answer
  The correct answer is D .
• Question 199: Convex mirror are used as driving mirrors because images formed are? Options:
  A) erect, virtual and diminished
  B) erect, real and diminished
  C) erect, virtual and magnified
  D) inverted virtual and diminished
  Show Answer
  The correct answer is A .
• Question 200: Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent Options:
  A) heat loss due to conduction
  B) vacuum loss
  C) heat entry into the inner flask due to convection
  D) heat loss due to radiation
  E) heat loss due to convection
  Show Answer
  The correct answer is D .