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 1091: The magnetic force on a charged particle moving with velocity v is Options:
  A) proportional to both the magnitude of the charge and the velocity v
  B) independent of the magnitude of the charge
  C) proportional to the velocity v only
  D) proportional to the magnitude of the charge only
  Show Answer
  The correct answer is A .
• Question 1092:

  Calculate the gravitation force of attraction between two planets of 10²⁴kg and 10²⁷kg separated by a distance of 10²⁰meters.

  Options:
  A) 6.67N
  B) 6.56N
  C) 7.5N
  D) 8.6N
  Show Answer
  The correct answer is A .
• Question 1093: A simple pendulum has a period of 17.0s. When the length is shorten by 1.5m, its period is 8.5s. Calculate the original length of the pendulum Options:
  A) 4.0 m
  B) 3.0 m
  C) 2.0 m
  D) 1.5 m
  Show Answer
  The correct answer is C .
• Question 1094: A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil. Options:
  A) 200
  B) 100
  C) 250
  D) 150
  Show Answer
  The correct answer is A .
• Question 1095: When ${}_{82}^{210}Pb$ decays to ${}_{80}^{206}Pb$, it emits Options:
  A) two alpha and two beta particles
  B) an alpha particle
  C) one beta particle
  D) one alpha and one beta particle
  Show Answer
  The correct answer is B .
• Question 1096: Dispersion of light by a glass prism is due to the Options:
  A) different colours of the glass
  B) different speeds of the various colours in glass
  C) defects in the glass
  D) high density of glass
  Show Answer
  The correct answer is B .
• Question 1097: One of the most important applications of bi-metallic strip is found in the construction of Options:
  A) a thermostat
  B) an altimeter
  C) a thermocouple
  D) a hydrometer
  Show Answer
  The correct answer is A .
• Question 1098:

  The conductivity of gases at low pressure can be termed as

  I. hot cathode emission

  II. thermo ionic emission

  III. cold cathode emission

  IV. Field emission

  Options:
  A) I and II
  B) II and III
  C) III and IV
  D) IV and V
  Show Answer
  The correct answer is C .
• Question 1099:

  

  A force of 5N act at a point Y on a rod XYZ as shown in the diagram above, if XY is 2m. What is the moment of the force about point X?

  Options:
  A) 0Nm
  B) 3Nm
  C) 7Nm
  D) 10Nm
  Show Answer
  The correct answer is A .
• Question 1100: Which of the following correctly describes the energy changes in the generation of light by a hydroelectric power station? Options:
  A) Electrical $\to$ mechanical $\to$ potential
  B) potential $\to$mechanical $\to$electrical $\to$ light
  C) mechanical $\to$ sound $\to$ electrical $\to$ light
  D) kinetic $\to$ mechanical $\to$ electrical $\to$light
  Show Answer
  The correct answer is B .