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 21:

  In homes, electrical appliances and lamps are connected in parallel because

  Options:
  A) less current will be used
  B) less voltage will be used
  C) parallel connection does not heat up the wires
  D) series connection uses high voltage
  Show Answer
  The correct answer is D .
• Question 22: An engineer intends to deviate a light ray from its path by 120^o through reflection from a plane mirror. Calculate the angle of incidence Options:
  A) 60^o
  B) 40^o
  C) 30^o
  D) 20^o
  Show Answer
  The correct answer is C .
• Question 23: Two metals P and Q of length l₁ and l₂ are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of lengths is 3:4. What is the ratio of increase in length of P to Q? Options:
  A) 7:5
  B) 5:7
  C) 1:2
  D) 2:1
  Show Answer
  The correct answer is C .
• Question 24: Two cells each of e.m.f. 1.5V and an internal resistance 2$\mathrm{\Omega }$ are connected in parallel. Calculate the current flowing when the cells are connected to a 1$\mathrm{\Omega }$ resistor Options:
  A) 0.75$\mathrm{\Omega }$
  B) 1.5$\mathrm{\Omega }$
  C) 0.5$\mathrm{\Omega }$
  D) 1.0$\mathrm{\Omega }$
  E) 0.6$\mathrm{\Omega }$
  Show Answer
  The correct answer is A .
• Question 25: Which of the following statements is true? The frequency of a vibrating string is Options:
  A) proportional to its length
  B) inversely proportional to the tension within it
  C) proportional to the aptitude of vibration
  D) inversely proportional to its cross-section
  E) proportional to the square root of the tension within it
  Show Answer
  The correct answer is E .
• Question 26: The angle between the direction of the earth's magnetic field and the horizontal is called the Options:
  A) angle of deviation
  B) magnetic declination
  C) magnetic meridian
  D) angle of dip
  Show Answer
  The correct answer is D .
• Question 27: Total internal reflection will not occur when light travels from Options:
  A) water to air
  B) water into glass
  C) glass to air
  D) glass into water
  Show Answer
  The correct answer is B .
• Question 28: In the hare's apparatus, water rises to a height of 26.5 cm in one limb. if a liquid rises to a height of 20.4 cm in the other limb, what is the relative density of the liquid? Options:
  A) 0.8
  B) 1.1
  C) 1.2
  D) 1.3
  Show Answer
  The correct answer is D .
• Question 29: Which of the following with respect to a body performing simple harmonic motion are in phase? Options:
  A) displacement and velocity of the body
  B) displacement and force on the body
  C) velocity and acceleration of the body
  D) force acting on the body and the acceleration
  Show Answer
  The correct answer is C .
• Question 30: If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to Options:
  A) friction
  B) viscosity
  C) surface tension
  D) evaporation
  Show Answer
  The correct answer is C .