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 251: Natural radioactivity consists of the emission of Options:
  A) $\alpha$ -particle and $\beta$ rays
  B) $\alpha$ -particle and X-rays
  C) $\gamma$-rays and X-rays
  D) $\alpha$-particle, $\beta$ rays and $\gamma$-rays
  E) $\alpha$ -particle, $\beta$ rays, $\gamma$-rays and X-rays
  Show Answer
  The correct answer is D .
• Question 252: According to Ohm's law, the ratio V/I is constant for Options:
  A) an electrolyte
  B) a diode
  C) a transistor
  D) silver
  E) all of the above
  Show Answer
  The correct answer is D .
• Question 253: The pair of physical quantities that are scalar only are ? Options:
  A) volume and area
  B) moment and momentum
  C) length and displacement
  D) Impulse and time
  Show Answer
  The correct answer is A .
• Question 254: The speed of light in air is 3 x 10⁸ms^-1. What is the speed in glass with a refractive index of 1.50? Options:
  A) 1.5 x 10⁸ms^-1
  B) 3.0 x 10⁸ms^-1
  C) 2.0 x 10⁸ms^-1
  D) 6.0 x 10⁸ms^-1
  Show Answer
  The correct answer is C .
• Question 255:

  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 increases but its frequency and wavelength decreases
  Show Answer
  The correct answer is B .
• Question 256: When the brakes in a car are applied, the frictional force force on the tyres is Options:
  A) is a disadvantage because it is in the direction of the motion of the car
  B) is a disadvantage because it is in the opposite direction of the motion of the car
  C) is an advantage because it is in the direction of the motion of the car
  D) is an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 257:

  Two bodies have masses in the ratio3:1. They experience forces whichimpart to them,acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

  Options:
  A) 1:4
  B) 2:1
  C) 2:3
  D) 2:5
  Show Answer
  The correct answer is C .
• Question 258: If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone? Options:
  A) 2700Hz
  B) 456Hz
  C) 444Hz
  D) 75Hz
  Show Answer
  The correct answer is A .
• Question 259:

  If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?

  Options:
  A) 250N
  B) 200N
  C) 100N
  D) 50N
  Show Answer
  The correct answer is A .
• Question 260: To protect a material from the influnce of an external magnetic field, the materials should be kept Options:
  A) square steel ring
  B) triangular zinc ring
  C) soft iron ring
  D) loop of copper wire
  Show Answer
  The correct answer is C .