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 1841:

  Which of the following equations is the correct definition of the reactance of an indicator L?

  Options:
  A) Reactance = (Amplitude of voltage) $÷$ (Amplitude of current)
  B) Reactance = (Amplitude of voltage) x (Amplitude of current)
  C) Reactance = (Amplitude of current)${}^2$ $÷$ (Amplitude of voltage)
  D) Reactance = (Amplitude of current)${}^2$ $÷$ (Amplitude of voltage)$\frac{1}{2}$
  Show Answer
  The correct answer is A .
• Question 1842:

  

  In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

  Options:
  A) north and south
  B) south and south
  C) north and north
  D) south and north
  Show Answer
  The correct answer is C .
• Question 1843:

  Which of the following statements about radioactivity is true?

  (i) Alpha particle is positively charged

  (ii)Beta particle is negativelycharged

  (iii) Gamma ray is neutral

  (iv) Beta particle has thesame massas helium atom

  (v) Gamma ray is charged.

  Options:
  A) i, ii, iii, iv only
  B) i, ii, iii only
  C) iv and v only
  D) i, ii and v only
  Show Answer
  The correct answer is B .
• Question 1844:

  The velocity y of a particle in a time t is given by the equation

  Y = 10 + 2t²

  Find the instantaneous acceleration after 5 seconds

  Options:
  A) 60 ms^-2
  B) 20 ms^-2
  C) 15 ms^-2
  D) 10 ms^-2
  Show Answer
  The correct answer is B .
• Question 1845: Which of the following statements is CORRECT? Options:
  A) charges generated on glass rubbed with silk are called negative
  B) charges in various media can be carried by protons detached from their atom
  C) the magnitude of any charge is a multiple of the charge of an electron
  D) the intensity of an electric field is a scalar quantity
  E) if 500 joules of work are required to move a 2-coulomb charge between two points, the potential difference between the two point is 100V
  Show Answer
  The correct answer is C .
• Question 1846:

  Which of the following can be described as high tension transmission?

  Options:
  A) High resistance and low voltage
  B) Low current and high voltage
  C) High current and low voltage
  D) High current and low resistance
  Show Answer
  The correct answer is B .
• Question 1847: Which of the following devices may be used to step up the voltage in a d.c. circuit? Options:
  A) a step-up transformer
  B) a d.c. generator
  C) a wattmeter
  D) an induction coil
  Show Answer
  The correct answer is B .
• Question 1848: A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N? Options:
  A) N90
  B) N50
  C) N45
  D) N5
  Show Answer
  The correct answer is C .
• Question 1849:

  

  The figure above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y

  Options:
  A) 1/3
  B) 2/3
  C) 3
  D) 6
  Show Answer
  The correct answer is C .
• Question 1850:

  A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

  Options:
  A) 2400 J
  B) 9600 J
  C) 1500 J
  D) 1200 J
  Show Answer
  The correct answer is A .