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 1231: An electric generator has e.m.f. of 240 V and an internal resistance of 1Ω if the current supplied by the generatoris 20A when the terminal voltage is 220 V, find the ratio of the power supplied to the power dissipated? Options:
  A) 11:1
  B) 1:11
  C) 12:11
  D) 11:12
  Show Answer
  The correct answer is C .
• Question 1232: Three 3ω resistance are connected in parallel what is the equivalent resistance? Options:
  A) 1ω
  B) 9ω
  C) 3ω
  D) 0.33ω
  Show Answer
  The correct answer is A .
• Question 1233: Two parallel plates at a distance of 8.0 x 10^-3m apart are maintained at a p.d of 600 volts with the negative plate earthed. What is the electric field strength? Options:
  A) 4.8 Vm^-1
  B) 75.0Vm^-1
  C) 4800.0Vm^-1
  D) 75000.0Vm^-1
  Show Answer
  The correct answer is D .
• Question 1234: Which of the following is the dimension of pressure? Options:
  A) ML^-1T^-2
  B) MLT^-2
  C) ML²T^-3
  D) ML^-3
  Show Answer
  The correct answer is A .
• Question 1235:

  

  The phase difference between waves P and q in the diagram above is

  Options:
  A) 2π
  B) π
  C) ^π/₄
  D) ^π/₂
  Show Answer
  The correct answer is D .
• Question 1236:

  

  Given the inductor of inductance 5mH, 10mH and 20mH connected in series, the effective inductance is

  Options:
  A) 0.35mH
  B) 3.50mH
  C) 2.90mH
  D) 35.0mH
  Show Answer
  The correct answer is D .
• Question 1237: Which of these statements are correct for the pressures in liquids? i. pressure in a liquid at a point acts equally in all directions. ii. pressure increases with depth. iii. pressure at a depth depends on the shape of the container. iv. pressure at the same depth in different liquids are proportional to the density at different liquids. Options:
  A) i, ii, iii only
  B) i, ii, iv only
  C) i, iii, iv only
  D) ii, iii, iv only
  Show Answer
  The correct answer is B .
• Question 1238: Two divers G and H are at depths 20m and 40m respectively below the water surface in a lake. The pressure on G is P₁ while the pressure on H is P₂. If the atmospheric pressure is equivalent to 10m of water, then the value of $\frac{p_2}{p_1}$ is Options:
  A) 0.50
  B) 0.60
  C) 1.67
  D) 2.00
  E) 3.0
  Show Answer
  The correct answer is D .
• Question 1239: When the vapour of a substance is in equilibrium with its own liquid, it is said to be Options:
  A) gaseous
  B) unsaturated
  C) liquefied
  D) diffused
  E) saturated
  Show Answer
  The correct answer is E .
• Question 1240: The speed of light in air is 3 x 10⁸ms^-1. If the refractive index of light from air-to-water is $\frac{4}{3}$, then which of the following is the correct value of the speed of light in water? Options:
  A) 4 x 10⁸ms^-1
  B) 2.25 x 10⁸ms^-1
  C) $\frac{4}{9}$ x 10⁸ms^-1
  D) 2.25 x 10²ms^-1
  E) 4.33 x 10⁸ms^-1
  Show Answer
  The correct answer is B .