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 251: A lamp is rated 240V 60W, calculate the resistance of its filament Options:
  A) 240$\mathrm{\Omega }$
  B) 360$\mathrm{\Omega }$
  C) 960$\mathrm{\Omega }$
  D) 1440$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 252: In a nuclear fusion experiment, the loss of mass amounts to 1.0 x 10^-6kg. The amount of energy obtained from the fusion is Options:
  A) 3.0 x 10^-4J
  B) 3.0 x 10^-1J
  C) 9.0 x 10⁴J
  D) 9.0 x 10¹⁰J
  Show Answer
  The correct answer is D .
• Question 253: A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is Options:
  A) 24cm
  B) 16cm
  C) 12cm
  D) 8cm
  Show Answer
  The correct answer is B .
• Question 254: Which of the following are the correct SI units of the quantities indicated? i.N(Force) II. Mn^-1 (Torque) iii. watt(Power) iv. kgms^-2 Options:
  A) i and ii only
  B) i, ii and iii only
  C) i, ii, and iv only
  D) i and iii only
  Show Answer
  The correct answer is D .
• Question 255: The latent heat of fusion of a substance is the heat required to Options:
  A) raise the temperature of unit mass of the substance by 1 ^oC
  B) maintain unit mass of the substance at constant temperature
  C) change unit mass of substance from solid to liquid at constant temperature
  D) change unit mass of liquid to vapour at constant temperature
  E) raise the temperature of unit mass by 100^oC
  Show Answer
  The correct answer is C .
• Question 256: When a ball rolls on a smooth level ground, the motion of its center is Options:
  A) translational
  B) oscillatory
  C) random
  D) rotational
  Show Answer
  The correct answer is A .
• Question 257:

  

  The total capacitance of the circuit above is

  Options:
  A) 0.25mF
  B) 0.50mF
  C) 0.75mF
  D) 1.25mF
  E) 1.50mF
  Show Answer
  The correct answer is E .
• Question 258:

  A block of mass 2kg resting on a smooth horizontal plane is acted upon simultaneously by two-forces, 10N due North and 10N due East. The magnitude of the acceleration produced by the force on the block is

  Options:
  A) 0.10ms^-2
  B) 7.07ms^-2
  C) 10.00ms^-2
  D) 14.10ms^-2
  E) 20.00ms^-2
  Show Answer
  The correct answer is B .
• Question 259: Three non-parallel coplanar forces which can be represented both in magnitude and direction by the three sides of a triangle taken in order will Options:
  A) have any one force being the equilibrant of the other two
  B) make a body move randomly
  C) make a body oscillate
  D) move a body along a straight line
  E) rotate a body about its axis
  Show Answer
  The correct answer is A .
• Question 260: A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine Options:
  A) 80.0%
  B) 76.6%
  C) 66.7%
  D) 60.7%
  Show Answer
  The correct answer is C .