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 1631:

  

  The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

  Options:
  A) 8.0 ms^-2, 4,0 ms^-2
  B) 4.0 ms^-2, 8.0 ms^-2
  C) 4.0 ms^-2, 2.0 ms^-2
  D) 2.0 ms^-2, 4.0 ms^-2
  Show Answer
  The correct answer is C .
• Question 1632: Three resistors, with substances 250$\mathrm{\Omega }$, 500$\mathrm{\Omega }$ and 1k$\mathrm{\Omega }$ are connected in series. A 6V battery is connected to either end of the combination. Calculate the pot3ential difference between the end of the 250$\mathrm{\Omega }$ resistor. Options:
  A) 0.20V
  B) 0.86V
  C) 1.71V
  D) 3.43V
  Show Answer
  The correct answer is B .
• Question 1633:

  The linear expansivity of brass is 2 x 10${}^{-5}$ C${}^{-1}$. If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

  Options:
  A) 16.03cm${}^3$
  B) 15.09cm${}^3$
  C) 16.00cm${}^3$
  D) 15.03cm${}^3$
  Show Answer
  The correct answer is B .
• Question 1634:

  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 1635: The graphite rods surrounding the uranium fuel rods in a nuclear reactor, are used to Options:
  A) absorb the neutrons and hence halt the nuclear process
  B) create the neutrons and hence slow up the nuclear process
  C) slowdown the neutrons and hence slow up the nuclear process
  D) speed up the neutrons and hence speed up the nuclear process
  Show Answer
  The correct answer is C .
• Question 1636: A wave that travels through stretched strings is known as Options:
  A) electromagnetic wave
  B) micro wave
  C) mechanical wave
  D) seismic wave
  Show Answer
  The correct answer is C .
• Question 1637: A current of 0.5A flows through a resistor when connected to a 40-V battery. How much energy is dissipated in 2 minutes? Options:
  A) 1200J
  B) 1500J
  C) 2400J
  D) 96000J
  Show Answer
  The correct answer is C .
• Question 1638: If ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_a is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .
• Question 1639: An elevator of mass 4800kg is supported by a cable which can safely withstand a maximum tension of 60 000N. The maximum upward acceleration the elevator can have is Options:
  A) 2.5ms^-2
  B) 5.0ms^-2
  C) 7.5ms^-2
  D) 10.0ms^-2
  Show Answer
  The correct answer is A .
• Question 1640: A rocket burns fuel at the rate of 10kgs^-1 and ejects it with velocity of 5 x 10³ms^-1. The thrust exerted by the gas on the rock is Options:
  A) 2.5 x 10⁷N
  B) 5.0 x 10⁴N
  C) 5.0 x 10²N
  D) 2.0 x 10^-3N
  Show Answer
  The correct answer is B .