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 1071: A cell of internal resistance r is connected to an external resistor R. The conductor for maximum power transfer is? Options:
  A) R < r
  B) R = r
  C) R = 2r
  D) R > r
  Show Answer
  The correct answer is B .
• Question 1072:

  

  The diagram above shows a meter bridge in which two of thee arms contain resistances R and 2Ω. A balance point is obtained at 60cm from the left end , calculate the value of R

  Options:
  A) 1.2Ω
  B) 1.3Ω
  C) 3.0Ω
  D) 6.0Ω
  Show Answer
  The correct answer is C .
• Question 1073: A uniform cylindrical block of wood floats in water with one-third of its height above the water level, in a liquid of relative density 0.8, what fraction of its height will be above the liquid level? Options:
  A) $\frac{1}{6}$
  B) $\frac{1}{5}$
  C) $\frac{1}{3}$
  D) $\frac{4}{5}$
  E) $\frac{5}{6}$
  Show Answer
  The correct answer is E .
• Question 1074:

  The equation of a wave travelling along the positive x-direction is given by;

  Y = 0.25 x 10^-3 sin (500t - 0.025x).

  Determine the angular frequency of the wave motion.

  Options:
  A) 0.25 x 10^-3rad s^-1
  B) 0.25 x 10^-1rad s^-1
  C) 5.00 x 10²rad s^-1
  D) 2.50 x 10³rad s^-1
  Show Answer
  The correct answer is C .
• Question 1075:

  When a sound wave passes from air into water its

  Options:
  A) speed and frequency increases but its wavelength remains the same
  B) speed and wavelength increases but its frequency remains the same
  C) speed decreases
  D) speed increases but its frequency and wavelength decreases
  Show Answer
  The correct answer is B .
• Question 1076: 40m³ of liquid is mixed with 60m³ of another liquid Q. If the density of P and Q are 1.00kgm^-3 and 1.6kgm^-3 respectively, what is the density of the mixture? Options:
  A) 0.05kgm^-3
  B) 1.25kgm^-3
  C) 1.30kgm^-3
  D) 1.36kgm^-3
  Show Answer
  The correct answer is D .
• Question 1077: The two liquids which are often used in thermometer on experiment basic is known as Options:
  A) Mercury only
  B) Alcohol and Water
  C) Mercury and Alcohol
  D) Alcohol only
  Show Answer
  The correct answer is C .
• Question 1078:

  A man walks 1km due east and then 1 km due north. His displacement is

  Options:
  A) √2km N 45°E
  B) 1km N 30°E
  C) 1km N 15°E
  D) √2km N 60°E
  Show Answer
  The correct answer is A .
• Question 1079: The focal length of a concave mirror is 2.0cm. If an object is placed 8.0cm from it, the image is at Options:
  A) 2.7m
  B) 2.0m
  C) 2.3m
  D) 2.5m
  Show Answer
  The correct answer is A .
• Question 1080: 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 .