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 1751:

  

  The figure above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

  Options:
  A) Q
  B) R
  C) A point between P and R
  D) A point between R and S
  Show Answer
  The correct answer is D .
• Question 1752: What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads? Options:
  A) o
  B) $\frac{1}{2}$
  C) 2
  D) 8
  E) 32
  Show Answer
  The correct answer is D .
• Question 1753:

  The velocities of light in air and glass are 3.0 x 10${}^8$ms${}^{-1}$ and 2.0 x 10${}^8$ms${}^{-1}$ respectively. If the angle of refraction is 30º, 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 1754: When a known standard resistor of 2$\mathrm{\Omega }$ is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor? Options:
  A) 1.10$\mathrm{\Omega }$
  B) 1.64$\mathrm{\Omega }$
  C) 2.44$\mathrm{\Omega }$
  D) 27.50$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 1755: Which of the following is correct about an electric cell? Options:
  A) Primary cell produces a large current for a long time
  B) Secondary cell has a very high internal resistance
  C) Primary cell has a very low internal resistance
  D) Secondary cell has a very low internal resistance
  Show Answer
  The correct answer is D .
• Question 1756:

  A metal rod has a length of 100cm at 200${}^{o}C$. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is 2 $\times$ 10${}^{-5}{C}^{-1}$

  Options:
  A) 200${}^o$C
  B) 300${}^o$C
  C) 100${}^o$C
  D) -100${}^o$C
  Show Answer
  The correct answer is D .
• Question 1757: If the normal atmospheric pressure in a laboratory supports a column of mercury 0.76m high and the relative density of mercury is 13.8, then the height of water column which atmospheric pressure will support in the same laboratory at the same time is Options:
  A) 0m
  B) 10m
  C) 13m
  D) 14m
  E) 18m
  Show Answer
  The correct answer is B .
• Question 1758:

  When water is boiling, it

  Options:
  A) gets hotter
  B) increase is mass
  C) decreases in mass
  D) changes to steam
  Show Answer
  The correct answer is D .
• Question 1759: A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5v. the resistance of the galvanometer is Options:
  A) 1Ω
  B) 2Ω
  C) 5Ω
  D) 10Ω
  Show Answer
  The correct answer is D .
• Question 1760: If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is Options:
  A) doubled
  B) reduced to a quarter
  C) reduced by half
  D) constant
  Show Answer
  The correct answer is B .