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 91:

  Of the following which is different from the other?

  Options:
  A) x-rays
  B) gamma-rays
  C) cathode rays
  D) ultra violet rays
  E) infrared rays
  Show Answer
  The correct answer is C .
• Question 92:

  If a source of solid is moving, a stationary listener will hear a sound of different frequency. This is called?

  Options:
  A) doppler effect
  B) resonance
  C) ultra sound
  D) rarefaction
  Show Answer
  The correct answer is A .
• Question 93: The particles emitted when ${}_{19}^{39}K{\text{ decay to }}_{19}^{39}K$ is Options:
  A) gamma
  B) beta
  C) electron
  D) alpha
  Show Answer
  The correct answer is A .
• Question 94: At reasonance, the phase angle in an a.c. circuit is Options:
  A) 90°
  B) 60°
  C) 0°
  D) 180°
  Show Answer
  The correct answer is C .
• Question 95: Heat transfer by convection will take place is one the following substance. Options:
  A) Stone
  B) Wood
  C) Mercury
  D) Water
  Show Answer
  The correct answer is D .
• Question 96:

  

  In the circuit Shown above, calculate the effective capacitance between X and Y

  Options:
  A) 3/4µF
  B) µ$2\frac{10}{13}\mu F$
  C) 12µF
  D) µ$4\frac{12}{13}\mu F$
  E) 13µF
  Show Answer
  The correct answer is B .
• Question 97:

  

  The current I in the fig above is

  Options:
  A) 4.00A
  B) 1.30A
  C) 0.80A
  D) 0.75A
  Show Answer
  The correct answer is A .
• Question 98:

  A boy standing some distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms${}^{-1}$, how far is he from the cliff?

  Options:
  A) 680m
  B) 170m
  C) 34m
  D) 85m
  Show Answer
  The correct answer is D .
• Question 99: Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons? Options:
  A) ${}_{28}^{30}X$
  B) ${}_{30}^{28}X$
  C) ${}_{30}^{58}X$
  D) ${}_{28}^{58}X$
  Show Answer
  The correct answer is D .
• Question 100: Two forces forming a couple are separated by a distance of 25cm. If one of the forces equals 40N, what is the moment of the couple? Options:
  A) 1000 Nm
  B) 500 Nm
  C) 10 Nm
  D) 5 Nm
  E) 1.6 Nm
  Show Answer
  The correct answer is C .