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 701: Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum? Options:
  A) conduction only
  B) convection only
  C) radiation only
  D) non of these methods
  Show Answer
  The correct answer is C .
• Question 702: An object of heights 5 cm is placed at 20 cm from a concave mirror of focal length 10 cm. the image height is? Options:
  A) 20 cm
  B) 15 cm
  C) 10 cm
  D) 5 cm
  Show Answer
  The correct answer is D .
• Question 703: Light of wavelength 5000 x 10^-8cm travels in free space with a velocity of 3 x 10⁸ms^-1. What is its wavelength in glass of refractive index 1.5? Options:
  A) 3333 x 10^-8cm
  B) 5000 x 10^-8cm
  C) 6666 x10^-8cm
  D) 750010^-8cm
  Show Answer
  The correct answer is A .
• Question 704:

  118.8cm² surface of the copper cathode of a voltameter is to be coated with 10^-6m thick copper of density 9 x 10³kgm^-3. How long will the process run with 10A constant current?

  [3.3 x 10^-7kgC^-1]

  Options:
  A) 5.4 min
  B) 10.8 min
  C) 15.0 min
  D) 20.0 min
  Show Answer
  The correct answer is A .
• Question 705:

  

  In the series a.c circuit shown above, the p.d across the inductor is 8V_r.m.s and that across the resistor is 6V_r.m.s. The effective voltage is

  Options:
  A) 2V
  B) 10V
  C) 14V
  D) 48V
  Show Answer
  The correct answer is B .
• Question 706: Calculate the inductance of a coil of resistance 30$\mathrm{\Omega }$ connected to a 100V a.c source if the coil draws an r.m.s current of 2A Options:
  A) 0.60H
  B) 2.50H
  C) 1.25H
  D) 0.04H
  Show Answer
  The correct answer is D .
• Question 707:

  Which of the following can be described as high tension transmission?

  Options:
  A) High resistance and low voltage
  B) Low current and high voltage
  C) High current and low voltage
  D) High current and low resistance
  Show Answer
  The correct answer is B .
• Question 708: A boy ran a distance of 200m in 24s. His average speed was 8.3ms^-1. Which of the following is correct about the units in which the statements above are expressed? Options:
  A) All the units are fundamental.
  B) All the units are derived
  C) All the units except one are S.I units
  D) Two of the units are fundamental and one derived.
  E) None of the units is S.I units.
  Show Answer
  The correct answer is D .
• Question 709: Two 2.0Ω resistors can be combined circuit to give an overall resistance of Options:
  A) 0.5Ω only
  B) 1.0 Ω only
  C) either 0,5Ω or 1.0 Ω
  D) either 1.0Ω or 4.0 Ω
  E) either 0.5Ω, 1.0Ω or 4.0Ω
  Show Answer
  The correct answer is D .
• Question 710: To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m? Options:
  A) 0.13m
  B) 0.25m
  C) 0.28m
  D) 0.50m
  Show Answer
  The correct answer is C .