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 1221: The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals? Options:
  A) 4V
  B) 8V
  C) 16V
  D) 200V
  E) 4000V
  Show Answer
  The correct answer is E .
• Question 1222: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 1223: Change of state is accompanied by change of Options:
  A) temperature
  B) volume
  C) heat content
  D) temperatureb and volume
  E) volume and heat content
  Show Answer
  The correct answer is C .
• Question 1224: When the length I of a piece of wire under constant tension is varied, the relationship of the frequency of the vibration f$\alpha$/ is Options:
  A) f$\alpha$/
  B) f$\alpha \frac{1}{I^2}$
  C) f $\alpha \sqrt{I}$
  D) f$\alpha \frac{1}{1}$
  Show Answer
  The correct answer is D .
• Question 1225:

  

  The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be

  Options:
  A) stationary and transverse
  B) stationary and longitudinal
  C) progressive and transverse
  D) progressive and longitudinal
  Show Answer
  The correct answer is B .
• Question 1226:

  A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At what angle is the ray reflected?

  Options:
  A) 180${}^o$
  B) 90${}^o$
  C) 0${}^o$
  D) 60${}^o$
  Show Answer
  The correct answer is C .
• Question 1227: A reservoir 500 m deep is filled with a fluid of density 850 kgm^-3. If the atmospheric pressure is 1.05 x 10⁵ Nm^-2, the pressure at the bottom of the reservoir is.
  [g = 10ms^-2] Options:
  A) 4.72 x 10⁶ Nm^-2
  B) 4.36 x 10⁶ Nm^-2
  C) 4.28 x 10⁶ Nm^-2
  D) 4.25 x 10⁶ Nm^-2
  Show Answer
  The correct answer is D .
• Question 1228: Two forces whose resultant is 100N, are at right angle to each other. If one of them makes an angle 30^o with the resultant, determine its magnitude. Options:
  A) 8.66N
  B) 50.0N
  C) 57.7N
  D) 86.6N
  Show Answer
  The correct answer is D .
• Question 1229: What is X in the equation given below? 42He + 94Be → 126C + X Options:
  A) electron
  B) hydrogen
  C) lithium
  D) neutron
  E) proton
  Show Answer
  The correct answer is D .
• Question 1230: If the threshold frequency for tungsten is 1.3 x 10¹⁵Hz, what is its work function?
  [H = 6.6 x 10^-34 Js] Options:
  A) 8.58 x 10^-19 J
  B) 8.50 x 10^-15 J
  C) 8.58 x 10^-17 J
  D) 8.85 x 10^-18
  Show Answer
  The correct answer is A .