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 1771: The bond between silicon and germanium is Options:
  A) covalent
  B) ionic
  C) dative
  D) electrovalent
  Show Answer
  The correct answer is A .
• Question 1772: Which of the following statements is NOT correct? Options:
  A) A galvanometer can be converted to an ammeter with a different range by connecting a high resistance in series
  B) An electric current always produces a magnetic field
  C) Maxwell's screw rule states that if a corkscrew moves inthe direction of the current, the hand turns in the direction of the lines of force
  D) Electromagnets are used in electric bells and telephone recievers
  E) The lines of force round a straight current carrying conductor are circular
  Show Answer
  The correct answer is A .
• Question 1773: A wave of frequency 10Hz forms a stationary wave pattern in a medium where the velocity is 20cms^-1. The distance between adjacent nodes is Options:
  A) 1.0cm
  B) 1.5cm
  C) 2.0cm
  D) 5.0cm
  Show Answer
  The correct answer is C .
• Question 1774: The motion of the prongs of a sounding turning fork is Options:
  A) circular
  B) oscillatory
  C) random
  D) rotational
  E) translational
  Show Answer
  The correct answer is B .
• Question 1775: When an astronomical telescope is in normal adjustment, the focal length of the objective lens is 50cm and that of the eye piece is 5.0cm. What is the distance between the lenses? Options:
  A) 10.0cm
  B) 30.0cm
  C) 45.0cm
  D) 55.0cm
  E) 250.0cm
  Show Answer
  The correct answer is D .
• Question 1776: The thermometer whose reading is indicated by a change in colour of its thermometric property is the? Options:
  A) bi-metalic strip thermometer
  B) thermocouple
  C) platinium resistance thermometer
  D) optical pyrometer
  Show Answer
  The correct answer is D .
• Question 1777: The velocities of light in air and glass are 3.0 x 10⁸ms^-1 and 2.0 x 10⁸ms^-1 respectively. If the angle of refraction is 30°, the sine of the angle of incidence is Options:
  A) 0.33
  B) 0.50
  C) 0.67
  D) 0.75
  Show Answer
  The correct answer is D .
• Question 1778:

  A radioactive isotope has a decay constant of 10^-6s^-1.

  Calculate its half - life?

  Options:
  A) 5.93 x 10⁶s
  B) 6.93 x 10⁷s
  C) 6.93 x 10⁹s
  D) 5.93 x 10⁷s
  Show Answer
  The correct answer is B .
• Question 1779: A cell of internal resistance 2 ohms supplies current to a 6 ohms resistor. The efficiency of the cell is Options:
  A) 12.0%
  B) 25.0%
  C) 33.3%
  D) 75.0%
  Show Answer
  The correct answer is D .
• Question 1780:

  An object is acted upon by a system of parallel three causing the object to be in state equilibrium. Which of the following statement is not correct

  Options:
  A) the resultant of the parallel forces is zero
  B) the algebraic sum of all the moments of the forces is zero
  C) all the parallel forces must be equal in magnitude and direction
  D) the sum of forces in one direction must be equal to the sum of forces in the opposite direction
  Show Answer
  The correct answer is C .