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 2291: If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be restored by Options:
  A) decrease the length of the wire
  B) increasing the length of the wire
  C) increasing the mass per unit length of the wire
  D) changing the temperature of the wire
  Show Answer
  The correct answer is B .
• Question 2292:

  Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?

  Options:
  A) formation of hydrogen bubbles on the electrode
  B) increase in the resistance of the cell
  C) local action
  D) polarization
  Show Answer
  The correct answer is C .
• Question 2293: Two 50$\mu$F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is Options:
  A) 5.00 x 10^-5C
  B) 2.50 x 10^-3C
  C) 1.25 x 10^-3C
  D) 1.00 x 10^-2C
  Show Answer
  The correct answer is B .
• Question 2294: At what frequency would a 10H inductor have a reactance of 2000Ω? Options:
  A) π/200Hz
  B) π/100Hz
  C) 100/πHz
  D) 100πHz
  Show Answer
  The correct answer is C .
• Question 2295: The process through which free electrons leave the surface of hot metal is known as? Options:
  A) photon emission
  B) photo emission
  C) thermionic emission
  D) electron emission
  Show Answer
  The correct answer is C .
• Question 2296:

  

  The net capacitance of the circuit shown above is

  Options:
  A) 8.0µF
  B) 6.0µF
  C) 4.0µF
  D) 2.0µF
  Show Answer
  The correct answer is D .
• Question 2297: The radioisotope ${}_{92}^{235}U$ decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic number of the resulting element? Options:
  A) 215 and 88
  B) 91 and 227
  C) 227 and 91
  D) 92 and 238
  Show Answer
  The correct answer is C .
• Question 2298: An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is Options:
  A) mg
  B) (m + pv)g
  C) (m - pv)g
  D) pvg
  E) [M/m-pv]g
  Show Answer
  The correct answer is C .
• Question 2299:

  The equation of a wave travelling along the positive x-direction is given by;

  Y = 0.25 x 10^-3 sin (500t - 0.025x).

  Determine the angular frequency of the wave motion.

  Options:
  A) 0.25 x 10^-3rad s^-1
  B) 0.25 x 10^-1rad s^-1
  C) 5.00 x 10²rad s^-1
  D) 2.50 x 10³rad s^-1
  Show Answer
  The correct answer is C .
• Question 2300:

  A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.

  [Take g = 10 ms-2]

  Options:
  A) 195
  B) 271 m
  C) 391 m
  D) 136 m
  Show Answer
  The correct answer is C .