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 331:

  A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms${}^{-1}$ from the top of a tower 10m high. Neglecting air resistance, its total energyjust before hitting the ground is? (Take g = 10ms${}^{-2}$)

  Options:
  A) 5J
  B) 10J
  C) 15J
  D) 20J
  Show Answer
  The correct answer is C .
• Question 332: After three half lifes, the fraction of a radioactive material that has decayed is Options:
  A) $\frac{1}{8}$
  B) $\frac{1}{3}$
  C) $\frac{2}{3}$
  D) $\frac{7}{8}$
  Show Answer
  The correct answer is D .
• Question 333: A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm^-3. the volume of the iron is? Options:
  A) 5.0 x 10^-2 ms^-2
  B) 4.5 x 10^--2 ms^-3
  C) 2.5 x 10^-2 ms^-8
  D) 2.0 x 10^-2 ms^-3
  Show Answer
  The correct answer is C .
• Question 334: A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is Options:
  A) 1A
  B) 4A
  C) 16A
  D) 18A
  E) 36A
  Show Answer
  The correct answer is B .
• Question 335:

  

  The wave phenomenon demonstrated in the diagram above is

  Options:
  A) reflection
  B) deflection
  C) diffraction
  D) refraction
  Show Answer
  The correct answer is C .
• Question 336: If the pressure on 100cm³ of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become Options:
  A) 25cm³
  B) 50cm³
  C) 100cm³
  D) 200cm³
  E) 400cm³
  Show Answer
  The correct answer is A .
• Question 337: Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if U and V are the object and image distances respectively? Options:
  A) $\frac{V}{r}$ - 1
  B) $\frac{2V}{r}$ - 1
  C) $\frac{U}{r}$ - 1
  D) $\frac{2U}{r}$ - 1
  Show Answer
  The correct answer is D .
• Question 338: In an experiment to determine terminal velocity, as the pressure increases, the viscosity off a liquid Options:
  A) increases
  B) decreases
  C) increases then decreases
  D) remains constant
  Show Answer
  The correct answer is D .
• Question 339:

  The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20º and 80ºC respectively is?

  Options:
  A) 3.0 x 10${}^2$km${}^{-1}$
  B) 3.0 x 10${}^3$km${}^{-1}$
  C) 5.0 x 10${}^3$km${}^{-1}$
  D) 3.0 x 10${}^4$km${}^{-1}$
  Show Answer
  The correct answer is B .
• Question 340: A dynamo primarily combines Options:
  A) mechanical energy into electrical energy
  B) electrical energy into kinetic energy
  C) potential energy into kinetic energy
  D) kinetic energy into potential energy
  Show Answer
  The correct answer is A .