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 1431: Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x10⁶m Options:
  A) 25.3kms^-1
  B) 4.2kms^-1
  C) 4.0kms^-1
  D) 11.3kms^-1
  Show Answer
  The correct answer is D .
• Question 1432:

  The velocities of light in air and glass are 3.0 x 10${}^8$ms${}^{-1}$ and 2.0 x 10${}^8$ms${}^{-1}$ respectively. If the angle of refraction is 30º, the sine of the angle of incidence is?

  Options:
  A) 0.33
  B) 0.50
  C) 0.67
  D) 0.75
  Show Answer
  The correct answer is D .
• Question 1433: Calculate the time taken for a mango fruit that fall from the tree 20 m to the ground [g = 10 ms^-2] Options:
  A) 10s
  B) 5s
  C) 4s
  D) 2s
  Show Answer
  The correct answer is D .
• Question 1434: 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 1435: A wave has a frequency of 2Hz and a wavelength of 30cm. The velocity of the wave is Options:
  A) 60.0ms^-1
  B) 6.0ms^-1
  C) 1.5ms^-1
  D) 0.6ms^-1
  Show Answer
  The correct answer is D .
• Question 1436:

  The pitch of a screw jack is 0.45cm and the arm is 60cm long. If the efficiency of the Jack is 75/π %, calculate the mechanical advantage.

  Options:
  A) 400
  B) 300
  C) 200
  D) 150
  Show Answer
  The correct answer is C .
• Question 1437: In a meter bridge experiment, two resistor 2$\mathrm{\Omega }$ and 3$\mathrm{\Omega }$ occupy the left and right gaps respectively. Find the balance point from the left side of the bridge Options:
  A) 20cm
  B) 40cm
  C) 60cm
  D) 80cm
  Show Answer
  The correct answer is B .
• Question 1438: If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is Options:
  A) doubled
  B) reduced to a quarter
  C) reduced by half
  D) constant
  Show Answer
  The correct answer is B .
• Question 1439: The difference between X-rays and gamma rays is that Options:
  A) x-rays are more penetrating than gamma rays
  B) x-rays are electromagnetic radiations while gamma rays are negatively charged radiation
  C) x-rays have higher frequencies than gamma rays
  D) x-rays arise from energy changes in the electronic structure of atoms while gamma rays come from the nucleus
  Show Answer
  The correct answer is D .
• Question 1440: The battery connection that permits current to flow across a p-n junction is called? Options:
  A) reverse baised
  B) forward baised
  C) amplification.
  D) rectification
  Show Answer
  The correct answer is B .