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 201: A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil.If the input voltage is 100 volts, the output voltage is Options:
  A) 5 volts
  B) 10 volts
  C) 15 volts
  D) 20 volts
  E) 25 volts
  Show Answer
  The correct answer is B .
• Question 202: The difference between sound waves and light waves is that sound waves Options:
  A) are transverse while light waves are longitudinal
  B) require a medium to travel while light waves does not
  C) can be diffracted but light waves cannot
  D) cannot be reflected but light waves can
  Show Answer
  The correct answer is B .
• Question 203: Pure silicon can be converted to a p-type by adding a controlled amount of Options:
  A) trivalent atoms
  B) tetravalent atoms
  C) pentavalent atoms
  D) hexavalent atoms
  Show Answer
  The correct answer is A .
• Question 204: In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that Options:
  A) a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
  B) the gold nucleus is positively charged and is concentrated in a tiny volume
  C) the gold nucleus emitted alpha particles
  D) the gold nucleus is concentrated in a tiny volume and contains alpha particles
  Show Answer
  The correct answer is B .
• Question 205: Emission spectra are caused by Options:
  A) kinetic energy of moving atoms
  B) potential energy of an electron in an atom
  C) transition of an electron from a higher energy level to a lower energy level
  D) transition of an electron from a lower energy level to higher energy level
  E) transition of excited protons in the nucleus.
  Show Answer
  The correct answer is C .
• Question 206: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 207: An electric device is rated 2000 W, 250 v. The correct fuse rating of the device is? Options:
  A) 9 A
  B) 8 A
  C) 6 A
  D) 7 A
  Show Answer
  The correct answer is B .
• Question 208: When a sound wave passes from air into water its Options:
  A) speed and frequency increases but its wavelength remains the same
  B) speed and wavelength increases but its frequency remains the same
  C) speed decreases
  D) speed remains the same but its frequency and wavelength change
  E) speed increases but its frequency and wavelength decreases
  Show Answer
  The correct answer is C .
• Question 209: Which of the following is a set of vectors? Options:
  A) force, mass and moment
  B) acceleration, velocity and moment
  C) mass, weight and density
  D) mass, volume and density
  Show Answer
  The correct answer is B .
• Question 210: An electric heater rated 220v, 1000 w is immersed into a bucket full of water, calculate the mass of water if the temperature changes from 30°c to 100°c and the current flows for 300seconds.[specific heat capacity of water = 4200 jkg^-1 K^-1] Options:
  A) 4.28 kg
  B) 42.86 kg
  C) 1.02 kg
  D) 7.14 kg
  Show Answer
  The correct answer is C .