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 1781: At what position will an object be placed in front of a concave mirror in order to obtain an image at infinity? Options:
  A) At the pole of the mirror
  B) At the principal focus
  C) at the center of the curvature
  D) Between the principal focus and the center of curvature
  Show Answer
  The correct answer is B .
• Question 1782: If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s²) Options:
  A) 27m/s²
  B) 2m/s²
  C) 4m/s²
  D) 7m/s²
  Show Answer
  The correct answer is A .
• Question 1783:

  I. Mass

  II. Density

  III. Temperature

  IV. Nature of substance

  Which of the above affect diffusion?

  Options:
  A) I and II only
  B) I,II and IV only
  C) II, III and IV only
  D) I, II, III and IV
  Show Answer
  The correct answer is B .
• Question 1784: A cube of side 10cm and mass 0.5kg floats in a liquid with only $\frac{1}{5}$ of its height above the liquid surface. What is the relative density of the liquid? Options:
  A) 0.125cm^-1
  B) 0.250gcm^-1
  C) 0.625cm^-1
  D) 2.500cm^-1
  Show Answer
  The correct answer is C .
• Question 1785:

  The electrochemical equivalent of silver is 0.0012g/C. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5mins, the current must be?

  Options:
  A) 6000A
  B) 100A
  C) 10A
  D) 1A
  Show Answer
  The correct answer is B .
• Question 1786: To convert a galvanometer to a voltmeter, a Options:
  A) high resistance is connected to it in series
  B) high resistance is connected to it in parallel
  C) low resistance is connected to it in parallel
  D) low resistance is connected to it in series
  Show Answer
  The correct answer is A .
• Question 1787:

  

  In the figure above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

  Options:
  A) both M and N have acquired negative charges
  B) both M and N have acquired positive charges
  C) M has acquired negative charge and N positive charge
  D) N has acquired negative charge and M positive charge
  Show Answer
  The correct answer is D .
• Question 1788:

  I. A liquid boils when its saturated vapor pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to an increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decreases the boiling point

  Which of the above combinations are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III only
  B) I, II, III, and IV
  C) I, II, and IV
  D) II, III, and IV
  Show Answer
  The correct answer is A .
• Question 1789:

  A cell can supply current of 0.4 A and 0.2 A through a 4.0Ω and 10.0Ω resistors respectively.

  This internal resistance of the cell is

  Options:
  A) 2.0Ω
  B) 1.0Ω
  C) 2.5Ω
  D) 1.5Ω
  Show Answer
  The correct answer is A .
• Question 1790:

  

  The arrow represents an object in front of a convex mirror whose focal points are X and Y. The image formed is

  Options:
  A) between X and P
  B) Between P and Y
  C) Between Y and Z
  D) Outside W
  E) Outside Z
  Show Answer
  The correct answer is B .