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 2541: Two insulated charged spheres of different sizes and carrying opposite charges are connected together by a metallic conductor. Current will flow from one sphere to the other until both sphere Options:
  A) carry the same magnitude and sign of charge
  B) are at the same potential
  C) are at the same temperature
  D) are of the same size
  Show Answer
  The correct answer is B .
• Question 2542:

  I. Coherence

  II. Same frequency

  III. Same wavelength

  IV. Same IntensityWhich of the conditions above are necessary to produce interference fringes?

  Options:
  A) I and III
  B) I, II and IV
  C) I, II and III
  D) II and III
  Show Answer
  The correct answer is C .
• Question 2543: Two liquids L₁ and L₂ are contained in a U - tube. The height and the density of L₁ are 8 cm and 10³ kgm^-3 respectively. If the density of L₂ is 800 kgm^-3, its height measured from the same level is Options:
  A) 8 cm
  B) 10 cm
  C) 16 cm
  D) 12 cm
  Show Answer
  The correct answer is B .
• Question 2544: Calculate the length which corresponds to a temperature of 20^oC if the ice and steam points of an unguarded thermometer are 400 mm apart Options:
  A) 20mm
  B) 30mm
  C) 60mm
  D) 80mm
  Show Answer
  The correct answer is D .
• Question 2545:

  The resultant capacitance in the figure above is

  Options:
  A) 0.4μf
  B) 0.8μf
  C) 1.8μf
  D) 4.5μf
  Show Answer
  The correct answer is B .
• Question 2546: The threshold of frequency for photoelectric effect depends on the Options:
  A) intensity of incident light
  B) frquency of incident light
  C) material of the photocathode
  D) potential difference between the cathode and the anode
  Show Answer
  The correct answer is C .
• Question 2547: A particle of weight 120N is placed on a plane inclined at 30⁰ to the horizontal. If the plane has an efficiency of 60% to the floor what is the force required to push the weight uniformly up the plane? Options:
  A) 50N
  B) 100N
  C) 175N
  D) 210N
  Show Answer
  The correct answer is B .
• Question 2548:

  

  In the diagram above, the ratio of he electric power dissipated in the 6Ω and the 3Ω resistor respectively is

  Options:
  A) 2:1
  B) 2:2
  C) 1:3
  D) 1:2
  Show Answer
  The correct answer is D .
• Question 2549:

  An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 $P_a$, what is the absolute pressure in $P_a$ in the tank if the height of the mercury in the open tube is 25 cm higher. density of mercury = $13600kg/m^3,g=9.8m/s^2$

  Options:
  A) 108,986 Pa
  B) 165,238 Pa
  C) 122,364 Pa
  D) 134,645 Pa
  Show Answer
  The correct answer is D .
• Question 2550: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .