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 391: Which of the following statements about water is NOT correct? Options:
  A) Pure water freezes at 0°C under normal pressure
  B) The volume of a given mass of water at 0° is less than its volume at 4°C
  C) Water boils at a definite temperature
  D) Water evaporates at all temperatures
  E) Water has its maximum density at 4°C
  Show Answer
  The correct answer is D .
• Question 392: A gramophone record takes 5s to reach its constant angular velocity of 4$\pi$ rads^-1 from rest. Find its constant angular acceleration. Options:
  A) 0.4$\pi$ rads^-2
  B) 0.8$\pi$ rads^-2
  C) 1.3$\pi$ rads^-2
  D) 20.0$\pi$ rads^-2
  Show Answer
  The correct answer is B .
• Question 393: Which of the following is a desirable property of a fuse Wire? Options:
  A) High expansively
  B) High thermal conductivity
  C) Low density
  D) Low electrical resistivity
  E) Low melting point
  Show Answer
  The correct answer is D .
• Question 394: Which of the following is NOT an example of a percussion instrument? Options:
  A) Bell
  B) Drum
  C) Flute
  D) Gong
  E) Xylophone
  Show Answer
  The correct answer is C .
• Question 395: In a wheel and axle mechanism the diameters of the wheel and axle are 40cm and 8cm respectively. Given that the machine is 80% efficient, what effort is required to lift a load of 100N? Options:
  A) 20N
  B) 25N
  C) 50N
  D) 80N
  Show Answer
  The correct answer is B .
• Question 396: The equation P^aV^bT^c= constant reduces to Charles Law if Options:
  A) a=1, b=1and c=0
  B) a=1, b=0 and c=-1
  C) a=0, b=1 and c=1
  D) a=0, b=1 and c=-1
  Show Answer
  The correct answer is D .
• Question 397: Which of the following does NOT cause a reduction of the surface tension of water? Options:
  A) soap solution
  B) detergent
  C) alcohol
  D) camphor
  E) grease
  Show Answer
  The correct answer is E .
• Question 398: In alternating current theory, the units of impedance, r.m.s. voltage and resonance frequency are respectively equal to Options:
  A) volt, ampere and hertz
  B) ohms, volt and hertz
  C) watt, ohms and radian
  D) ohms, hertz and joule
  Show Answer
  The correct answer is B .
• Question 399: The primary winding of a transformer has 400 turns and its secondary has 100 turns. If a source of e.m.f. of 12V is applied to the primary, the secondary e.m.f. will be Options:
  A) 3V
  B) 6V
  C) 24V
  D) 48V
  Show Answer
  The correct answer is A .
• Question 400:

  A car of mass 800kg attains a speed of 25m/s in 20secs. The power developed in the engine is?

  Options:
  A) 1.25 x 10${}^4$W
  B) 2.50x 10${}^4$W
  C) 1.25 x 10${}^6$W
  D) 2.50 x 10${}^6$W
  Show Answer
  The correct answer is A .