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 421: I. Refraction II. Interference III. Diffraction Which of the above properties are common to all waves? Options:
  A) II and III only
  B) I, II and III
  C) I and II only
  D) I and III only
  Show Answer
  The correct answer is B .
• Question 422:

  A solid weighs 4.8g in air, 2.8g in water and 3.2g in Kerosine. The ratio of density of the solid to that of the kerosine is

  Options:
  A) 2
  B) $\frac{3}{2}$
  C) $\frac{2}{3}$
  D) 3
  Show Answer
  The correct answer is D .
• Question 423:

  If an object just begins to slide on a surface inclined at 30ºto the horizontal,the coefficient of friction is?

  Options:
  A) √3
  B) $\frac{\surd 3}{2}$
  C) $\frac{1}{\surd 2}$
  D) $\frac{1}{\surd 3}$
  Show Answer
  The correct answer is D .
• Question 424:

  

  If current flows in the direction of the arrows in the solenoid above, the north pole is at

  Options:
  A) P
  B) Y
  C) X
  D) Q
  Show Answer
  The correct answer is D .
• Question 425: A capacitor 8$\mu$F is charged to a potential difference of 100V. The energy stored by the capacitor is Options:
  A) 1.0 x 10⁴J
  B) 8.0 x 10J
  C) 1.25 x 10J
  D) 4.0 x 10^-2J
  Show Answer
  The correct answer is D .
• Question 426: The speed of light in a Hg in the morning at a temperature of 27^oC. Hard driving in the afternoon raised the temperature of the tyres by 57^oC. The tyre pressure had by the afternoon was Options:
  A) increased by 15.0cm Hg
  B) decreased by 15.0cm Hg
  C) increased by 22.50cm
  D) decreased by 22.50cm Hg
  E) remained constant
  Show Answer
  The correct answer is A .
• Question 427:

  The earth's gravitational field intensity at its surface is about

  (G = 6.7 × 10${}^{-11}$Nm${}^2$/kg${}^2$, mass of the earth is 6 × 10${}^{24}$kg, radius of the earth is 6.4 × 10${}^6$m, g on the earth = 9.8m/s${}^2$)

  Options:
  A) 6.7N/kg
  B) 7.9N/kg
  C) 8.0N/kg
  D) 9.8N/kg
  Show Answer
  The correct answer is D .
• Question 428:

  

  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 429: The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell? Options:
  A) 0.10 ohms
  B) 0.25ohms
  C) 0.40ohms
  D) 2.50ohms
  E) 4.00ohms
  Show Answer
  The correct answer is C .
• Question 430: The force on a charge moving with velocity v in a magnetic field B is half of the maximum force when the angle between v and B is Options:
  A) 90^o
  B) 45^o
  C) 30^o
  D) 0^o
  Show Answer
  The correct answer is C .